Click Article for the PDF file of this story.

by Darren Murph posted Nov 9th 2009 at 11:22AM

It’s rare if a month flies by without some random university or DIYer proclaiming that the next major jump in battery technology is just over the horizon, and yet, here we are — in the year 2009 — still buying overpriced AA cells from Duracell and Energizer that deplete far too quickly given the technology available. Heck, even those standard rechargeable cells have seen their performance degrade hastily in our experiences, and we’ve been longing for a rechargeable cell that was actually worth its salt for a long, long time. Frankly, we passed off the PowerGenix NiZn battery as just another slice of vaporware when it was first uncovered in late 2008, but after they went on sale this summer, we decided to really put a set through the paces. Click on to find out how we feel about ‘em after months and months of hardcore usage.

One of the major concerns with traditional NiMh rechargeables is just how weak they are, and just how quickly their longevity declines. With few exceptions, most of these cells can’t actually power a dedicated hotshoe flash for more than a few minutes (if at all), and any application that demands a serious amount of power generally asks too much from these pricey tubes. Furthermore, these batteries also have a tendency to go from fully charged to empty faster and faster as time goes on, and while we understand that said phenomenon is simply a harsh reality when dealing with devices such as this, we always felt that the performance decline was unacceptable given the price premium attached to ‘em.

Enter PowerGenix, a little known company with a lot of hustle and a pocket full of promises. The company is selling 1.6v AA Nickel Zinc rechargeables at a variety of outlets now, with the MRSP for a 4-pack sitting at $14.99; the special charger (needed for charging NiZn batteries) can be purchased along with four cells for $24.99. We began using these with exceptionally low expectations, and six wedding shoots later, we’re now grinning from ear to ear. Our Nikon Speedlight SB-600 chews through standard batteries like a voracious beast, only squeezing out around 200 to 300 shots on a warm, lucky day. The PowerGenix cells, however, allowed us to fire the flash anywhere between 300 and 400 times in all conditions, and even after running them bone dry and juicing them back up for months on end, we’ve yet to see ‘em take a performance hit.

This bag is made from 7 plastic bottles 99% recycled content by weight rePETe Original

ChicoBag rePETe Original Canyon Brown

• Materials: Fabric 100% Recycled PET, Carabiner 97% Recycled Aluminium, Cord 100% Recycled PET, Cordlock 100% Recycled Polyurethane (Thread, Screen Print, Care Label Made from Virgin Material)
• Dimensions:Bag 18 x 14.5- Pouch 3×4 (approximately)
• Weight: 1.5 oz
• Capacity: 25 lbs. (One gallon of milk is approximately 7 lbs.)
• Washing: Machine wash cold and hang dry.
• See More Colors below

Vendor: Depoteco.com

ChicoBag rePETe Original reusable shopping bag now at DepotEco.com!

The ChicoBag rePETe Original follows the Original reusable shopping bag design but is made from 99% recycled content by weight! Each rePETe has uniquely accented handles with the phrase, “This bag is made from 7 plastic bottles!” accompanied by a custom illustration. A list of the recycled materials used in manufacturing the rePETe is printed on the inside of each bag. All ChicoBags are reusable shopping bags designed to be unforgettable. They effortlessly fit in your pocket when they are stuffed into their integrated stuff pouch. Design encourages you to always have your ChicoBag on hand or pocket or purse.

What is PET?

Polyethylene terephthalate, abbreviated PET, is found in the polyester family and often used in the production of beverage containers like plastic bottles.

Learn the Facts

The average American uses between 300 and 700 plastic bags per year. If everyone in the United States tied their annual consumption of plastic bags together in a giant chain, the chain would reach around the earth 760 times! Learn more

Did You know…?

10 Things You Can Do to Create a Reusable Bag Habit in your Community

1. Wage a campaign in your town or city to end the use of single-use bags by encouraging legislators to implement a grocery bag fee. Contact advocacy@chicobag.com for more information.
2. Talk to local community and environmental groups about the bag issue and find out if they want to get involved.
3. Create a petition asking for your city to take on the single-use bag problem. Circulate it at schools, universities, the library, grocery stores, farmer’s markets, and anywhere else where you can connect with your neighbors.
4. Encourage local retailers to start a smart bagging policy with these tips:
   - Offer a bag refund to customers who bring their own bags.
   - Place signs reminding people to bring their own bags
   - Create a reusable bag drop-off for others to use.
   - Create an in-store bag recycling program.
   - Sell reusable bags in their store.
5. Bring an extra reusable bag to the grocery story the next time you shop and give it away to a stranger who doesn’t have them. Ask them to “Pay it Forward” and give a bag away the next time they shop.
6. Write a letter to the newspaper explaining the environmental problems with paper and plastic bags. Use our resources to help you come up with talking points.
7. Start a ChicoBag fundraiser to raise money for an environmental or litter prevention group. Contact fundraisers@chicobag.com for more information!
8. Stage a Bag Monster sighting in your community. Contact bagmonster@chicobag.com to set it up!
9. Give your friends and family reusable bags as gifts for birthdays, graduation, housewarming parties, and special holidays.
10. Set a good example by just saying no to single-use bags when you’re at the store. Others in line will follow suit!

Buy Now Colors Below!

The rePETe Original Reusable Shopping Bag ChicoBag rePETe Original Canyon Brown

$8.00

The rePETe Original Reusable Shopping Bag ChicoBag rePETe Original Green Cypress

$8.00

The rePETe Original Reusable Shopping Bag ChicoBag rePETe Original Moss Green

$8.00

The rePETe Original Reusable Shopping Bag ChicoBag rePETe Original Pacific Blue

$8.00

The rePETe Original Reusable Shopping Bag ChicoBag rePETe Original Red Clay

$8.00

They do offer the adapter shells. Some people have great success with these others report back that they seem not to work at all.

Tips, for using the eneloop D and C shells.

1. Make sure the AA battery is completely inserted into the Spacer / Adapter. The Small tip of the eneloop (positive) needs to touch the extremely small ring of metal on the inside of the tip of the adapter.

2. In many case the AA eneloop battery bottom (negative) side is to small to touch the negative contact terminal in the flashlight or other devices .

Solution, Tape a washer or a penny to the eneloops negative side/ bottom of the adapter terminal after inserting the AA battery. This should then provide sufficient contact area for the device.

One of our customers recently sent this in to us. ( Thanks for the feedback !! )

“This may be a new one for you. I knew that I had pushed the AA battery completely into the D cell adapter because it clicked into place. I even pushed the two D cells together inside the flashlight housing to make sure they made contact. This is in a Maglight 2 D-cell flashlight.
Well, as I looked at the two parts of the flashlight I noticed the butt end with the wire coil that presses against the batteries was larger than the AA battery butt end in the adapter. Ah HA! I put a balled up piece of foil over the AA battery end and screwed the butt end of the flashlight on and, voila’! It works! So, it was simply the coiled end of the flashlight was larger than the AA battery so no contact was made. Please add this to your support notes for other Eneloop users who may run into the same issue.

BTW, I’m still very happy with this kit. If a bit of foil is all it takes to reduce my dependence on disposable batteries then that’s fine! I can reuse the same bit of foil over and over and over and over and…….”

We love to hear that about eneloops.. and yes they are worth any extra effort.

———————-

Keep the comments coming.

See Below for Details and to buy.

This one-watt LED flashlight features a magnetic tail cap so that you can easily attach it to ferrous metal surfaces. Its reflective end cap can be moved from the base end to the bulb end to convert the flashlight into a standing 360-degree lantern. Batteries not included. Single 1W LED 2 brightness levels Strobe mode Magnetic end cap Converts to reflective lantern

Brand Information Brand: Ziotek Model: ZT1420318 Product Specifications Light Source:  1 x LED White Flashlight Power:  1W Batteries:  3 x AAA Power Source:  Battery Dimensions:  7.5″ Length x 1.75″ Diameter

1 Watt LED Lantern Flashlight w/Magnetic End Ziotek ZT1420318 LED Lantern/Flashlight

$21.90

This Very Popular LED Work Light is flying off our shelvs.

We really like it because it rechargeable and the LEDs allow the unit to stay bright for a long time.

Details blow.

Product Details

LED Rechargeable Work Light

• Flip-out kickstand for flexibility
• Built-in Rechargeable Ni-MH Battery Pack Included
• Swivel Hook
• High-Impact, shatter resistant housing
• Model: VEC164 – Brand: Vector

Detail Images

The extremely well-designed Vector VEC164 26 LED Foldable/Rechargeable Work Light & Flashlight is ideal for roadside emergencies, power failures, camping and much more! The Vector VEC164 features 180 degree of rotation for optimal light positioning with long lasting ultra-bright LED bulbs that never need replacing! With the Vector VEC164 you can get up to 7 hours of continuous use on low mode and up to 4 hours on high mode! Its water-resistant, shatterproof housing is great for outdoor use. 120 volt AC and 12 volt DC power/charging cords are also included. Built-in Rechargeable Ni-MH Battery Pack Included Swivel Hook High-Impact, shatter resistant housing Vector VEC164 26 LED Rechargeable Work Light $29.99

Brand Information Brand: Vector Model: VEC164

Check them out .

Double Wall Vacuum Insulated Travel Mugs

BPA free. (2 Pack 1 Blue and 1Stainless) – Two Stainless Steel Auto Seal Mugs. Impossible to spill, and 100% leak-proof. Those are pretty bold claims, but they are what AUTOSEAL® is all about. Need a leak-proof travel mug to use in the car? Need a spill-proof coffee mug to use at your desk? Need a travel mug that will keep your coffee hot for hours? How about all of the above? AUTOSEAL® has you covered. The Stainless Steel AUTOSEAL® Mug has a double wall and is vacuum-insulated, ensuring that your hot coffee or other beverages stay that way for hours.

2 Pack Contigo Mugs

• Patented AUTOSEAL® lid is 100% leak-proof and 100% spill-proof.
• Drinking made easy! Press to sip. Release to seal. AUTOSEAL® automatically seals between sips to ensure no spills.
• Vacuum-insulated technology keeps beverages hot for 4 hours, and cold for 12 hours.
• Contoured body makes this mug easy to hold and easy on the eyes.
• Will hold up to 16 oz. of your favorite beverage and fits most standard car cupholders.

• See it in use!
• See how it works!

Double Wall Vacuum Insulated Travel Mugs *(2 Pack 1 Blue and 1 Stainless)* Contigo Mugs

$35.00

Double Wall Vacuum Insulated Travel Mugs *(2 Pack Stainless)* Contigo Mugs

$35.00

Double Wall Vacuum Insulated Travel Mugs *(2 Pack 1 Blue and 1 Stainless)* Contigo Mugs

$35.00

Double Wall Vacuum Insulated Travel Mugs *(2 Pack 1 Red and 1 Stainless)* Contigo Mugs

$35.00

Contigo Kids Mug 4 Pack Two 9 oz Hot Pink Mugs & Two 9 oz Lavender Mugs BPA Free!

$29.99

Contigo Kids Mug 4 Pack Two 9 oz Blue/Green Mugs & Two 9 oz Gray/Orange BPA free Mugs

$30.00

REDSUN- RP2100 Imported by C.Crane as the ;

CCRadio-SW AM/FM Shortwave Radio

A new name in the World Band Radio arena is Redsun Electronics of China. Their new line includes two models currently available: the RP-2100 reviewed here, currently selling on eBay from China at just under $57.00 plus $38 shipping for a total of about $95 delivered to the US. Redsun also offers the RF-1210 analog at about $50 delivered.

The RP-2100 has been the subject of much speculation as a potential candidate to unseat the Eton S-350DL/Tecsun BCL3000 radios from their position of pre-eminence in the world of approximately $100, high performance, lunchbox sized multi-band portables. Is the RP-2100 a “better radio” than the S-350DL? And if so, does it sacrifice anything along the way? Finally, how does it compare with other reference portables at various price points and with varying strengths and weaknesses? Hold tight…I’ve just spent the better part of a month comparing the Redsun with the Eton S-350DL and original S-350 versions, the Eton E-1, E-5, a Panasonic RF-2200 and a GE Superadio SRII & SRIII. I also compared it with several other portables I had at my disposal to satisfy my own curiosity and feel these comparisons will paint a clear picture of where the RP-2100 shines and where it could benefit from a bit of minor tweaking on Redsun’s part to be all it could be. The results are interesting to say the least.

Let me urge two cautions. Initial experiences can be misleading with the RP-2100 until you learn its personality…especially with the Chinese lettering it takes some time to learn all the control functions. Also, this radio is from an initial production run…one of the very first production units to become available. It is entirely possible and even likely that Redsun will make minor improvements and updates as they go along. This has generally been the case with world band portables by all manufacturers. Also, other Chinese manufacturers such as Degen and Tecsun seem to constantly evolve their product much as computer software never stops being updated. Other Degens and Tecsun’s show continuing improvements throughout their production and there is every reason to think Redsun could act similarly. At this early stage this is pure conjecture and I didn’t find any outright flaws that need to be addressed…just a few areas where things could be made a bit better with seemingly small improvements. I will explain as we go along.

DESCRIPTION

The Redsun RP-2100 is a large multi-band portable measuring approximately 11 ½” x 7 ¼” x 2 ¾”, or 290 mm x 185 mm x 70 mm. It is in the same general size category as the Eton S350DL and E-1 radios which is my favorite size for an around-the-house portable radio. They’re small enough to be easy to move about yet large enough to offer good RF performance, good sound and be easy to use.

The RP-2100 is PLL tuned covering: FM: 87.00 – 108.00 MHz
MW: 522-1620 or 1710 KHz/9 or 10 KHz steps
SW 1: 1711 – 10010 KHz
SW 2: 9990 – 20010 KHz
SW 3: 19990 – 29999 KHz
50 Presets are available with 10 in each band

Dual Conversion on AM and SW

Two IF Bandwidths: Nominally 6 KHz and 3 KHz

Audio Power Output 2.5 Watts on AC Power

Power Supply: AC 220Volt Input
DC 6 – 9 Volt center negative
4 D Cells or 4 AA Cells (switch selectable)
Built-In Charger

I.F. Output Jack (an outboard SSB adapter is said to be forthcoming) – I will report on it as an addendum at that time

Stereo Headphone Jack

Stereo Line Out Jacks (Dual RCA Type)

Controls: The RP2100 is well laid out. It is labeled mostly in Chinese…the translated English Manual available from Liypn on eBay:

V-COM-COLLECTIONS

makes initial operation much easier, not only by providing translations of all the knob markings but with descriptions of some controls whose use isn’t immediately obvious.

I have also discovered that English-labeled RP2100′s are available from Tquchina:

RADIO-AND-COMPONENT

* See end note about buying Chinese radios thorugh eBay:

The roomy front panel contains the large Tuning knob, to its left are the mode and band selector knobs with the Volume Control at the bottom. The smaller knobs at the lower left are RF Gain, Treble and Bass, and a 1/8″ Stereo mini jack for headphones is at the far lower left.

Above the Tuning Knob are three push buttons for: Stop (a tuning lock), Slow and Fast tuning. To the right a group of 8 pushbuttons control Down & Up Tuning/Seeking, Memory, Alarm, Timers 1 & 2, Q. Tune and Preset buttons. The Q. Tune button is important and will be described in a moment. At the top right are three buttons for Power/Sleep, Local/World Time and Lock which disables all functions except the Light Switch. You can display World or Local Time momentarily while the radio is on.

On the top panel are a Light Switch (which can turn the lights on for 8 seconds or lock them on) and a Snooze Bar.

The left side contains RCA Stereo Line Out jacks, Battery Size Selector, DC and AC Power in jacks. The right side contains switches for Button lights, DX/Local and Internal/External Antennas. The Button Lights switch allows the pushbuttons to also illuminate when the dial light is on, evidently a power saving feature.

The back panel contains two Pal Connectors: One an external FM/SW antenna input, the other an AM IF Output jack for future connection to an outboard SSB or DRM decoder, and spring loaded connectors for a MW (AM) antenna. Inside the battery compartment which will let you load 4 AA and 4 D cells (simultaneously if you wish), is the 9/10 KHz MW Step switch.

Basic Operation & Initial Impressions: The RP2100 is a fun radio to use after a short time spent getting to know it. The high points are: excellent RF performance on all bands, excellent sound, solid feel and decent, although not superlative, tuning via the knob. It has a neat looking handle which reminds me of the Grundig Satellit 700′s handle…attractive and it folds away to nothing. It was immediately apparent that reception was sensitive and strong, and the audio likewise impressed me immediately. Compared with my other similarly-sized radios the Redsun offers a full, warm sound with plenty of audio punch and excellent clarity. It’s rated at 2.5 watts on AC power…even if it’s half that on battery power, it is enough to fill a large room authoritatively and pleasantly. It sounds better than my Eton S350DL or E-1…the only portables I have which sound better are the Superadio series, but the Redsun is closer than any other contender in a similarly-sized radio. The two IF bandwidths are given as 6 KHz and 3 KHz and appear to be well-chosen for program listening. The Wide mode is fairly wide…it lets stronger AM/SW signals retain a natural sounding clarity, while the Narrow filter similarly seems well chosen to eliminate interference under most conditions while maintaining as much clarity as possible. When the Wide filter is too wide, usually at night when there are many adjacent signals, I find I can still get excellent results using the Narrow setting and off-tuning by 1 or 2 KHz. It works well.

I also noted excellent AGC range…as I tuned weak signals on the S350DL and RP2100, the weaker signals maintained their full volume on the Redsun while I had to advance the volume a bit on the S350DL to match it. The eventual reception was actually not very different, but the superior AGC range of the Redsun made it seem more sensitive. I also have to say that comparing my S350DL with the Redsun, the Redsun was decidedly easier to tune on SW…the ’350 is just more finicky to get it tuned just right…the Redsun locks onto, say 9515 and stays there. By comparison the S350 series are much fussier to tune on SW than they are on AM and FM.

However, the radio is not without its quirks…here are a few I have noticed.

Tuning: The RP2100 is unique in that it is a PLL design (digitally tuned), yet it has no keypad for Direct Frequency entry. This seems like a serious omission in a day where PLL portables with keypads are common. Also, the RP2100′s 50 Memory positions are limited to 10 presets per band. Maybe not a problem to someone like me who uses memories only for a few stations, but curious given the fact that lesser radios offer hundreds of memories these days.

However, a quick look at the pictures of the vintage Panasonic RF-2200 and the Grundig/Eton S-350 series radios reveals the concept of the Redsun: to mimic the operation of these analog receivers but with digital technology for consistency and accuracy, while maintaining a top level of overall RF and audio performance. The design makes perfect sense when looked at in that light.

The Redsun divides the SW spectrum into three bands, SW 1, SW 2 and SW 3, similarly to those analog radios. But with no keypad it takes about 20 seconds to twist the dial from one end of a band to the other and that is distinctly unpleasant. The encoder circuit itself sets this “speed limit;” that is, you can spin the knob faster than the encoder can take the input, so it stops advancing. You soon learn what the maximum speed for the knob is. However, you can navigate quickly with the “Q. Tune” button, which is not explained well in the manual. “Q. Tune” (Quick Tune) allows you to step through SW bands. So if, for example, you’re on SW 1 (1711 – 10010 KHz), pressing “Q. Tune” steps you sequentially through 2250, 3150, 3850, 4700, 5800, 7100, and 9400 KHz, the nominal starting points of the 120 meter through 31 meter bands. It performs similar duty on SW 2 & 3 as well as AM and FM where it steps you through 100 KHz AM and 1 MHz FM. This eliminates the need for heavy duty knob spinning and becomes natural after a short period of use. The tuning action via the knob is not quite noise-free. It is mute-free which means you can tune without fear of missing anything, but there are some spurious noises while tuning that I wish weren’t there. However, overall the set has a nice feel when you are scanning within bands…the two tuning speeds seem about right and final tuning, with its PLL accuracy, is infinitely easier than on its analog predecessors. Also note that as battery level drops almost to the point where the unit shuts off, just before that point the tuning becomes a bit touchier. I wondered what was going on at which point it switched off due to low battery. I don’t consider this to be an issue but it’s worth noting.

Another feature not possible on the analog-tuned S-350 or RF-2200 is that each band (AM/FM/SW1/ SW2/SW3 “remembers” where you were last tuned within that band, so you can be listening to your local AM station on 600, tune away to check out some shortwave on another band, but when you switch back to AM the Redsun will be right where you left it on 600 KHz…this is very handy and is a nice feature of the RP2100.

The push buttons require solid pushes. Interestingly, they are clicky buttons, but the click does not necessarily indicate that the switch has been activated. If you don’t hold the button for just a split second, it won’t actuate, although you will still hear and feel the click. Not a biggie – the delay seems to be in the software itself rather than in the switches and affects every front panel switch identically. It’s not a problem once you get used to it, but quick taps on the switches will be ignored.

FM Stereo/Mono: The RP2100 delivers Stereo FM at the Headphone and Line Out jacks. But there is an oddity. Be sure to keep the FM Stereo/Mono switch in Mono at all times when using the radio with its built-in speaker. If you leave the radio in Stereo you will hear only Right Channel audio from the speaker…normally you would hear a mono mix of the two channels, but the RP-2100 does not do this. You will also not get the improved reception mono mode often provides when signals are less than perfect, so be sure you keep the switch in Mono. Again, it’s not a problem as long as you’re aware of it, but it is odd.

Illumination: I have to say the lighting is dim and a bit unusual. First there are two buttons for controlling the lighting; the “Button Light Switch” which enables or disables the Button Lights…this seems superfluous. Additionally the main “Light Switch” on the top operates somewhat like the original S-350/BCL2000 series switches did, which means if you lock the lights “ON”, they will stay on, even after you turn the radio off. (Newer S-350′s turn the lighting off when the radio goes off). One oddity though. If you lock the lights “On”, they only stay on until you operate any of the controls…then they revert to the 8 second on/auto off mode…kind of annoying. Unfortunately, the dial lighting is also rather dim, making it hard sometimes to tell whether they are on or off under typical room lighting. Several times I have returned to the radio to find I left the lights on…I never did this with my other radios with similar arrangements. The S-350DL display lighting is much brighter and really stands out compared with the Redsun’s display. I do like the Redsun’s lighted buttons though.

Battery Level Indication: The Redsun can operate on either AA or D cells. I only tested them on AA cells as I was comparing three samples together. I noted that the level indication is conservative to say the lest. T-It is a 3 segment meter, and the third segment drops out almost immediately, at least on AA cells. Again, not a big problem…with any radio one must learn the characteristics of the metering, but I would judge this meter to read a bit lower than reality. All three samples I have are identical in this regard.

PERFORAMANCE COMPARISONS

I ran several comparisons with various other radios to give an overall impression of how the RP2100 performs. All tests were done with fresh batteries and built-in antennas only. The RP2100 acquitted itself very well overall.

First test: Redsun RP2100 versus Eton S-350DL and Eton E-5.

With all the comments on the internet as to whether or not the Redsun succeeds where the S350 series fails I had to compare these two radios first thing. I added the E-5 because it is presently one of the most sensitive radios in its size class, although it retails for around $150 so I wanted to see how it might compare with these larger yet less expensive portables.

AM Reception: The Redsun demonstrated virtually identical sensitivity and selectivity compared with the S-350DL. Again, the Redsun’s superior AGC makes it seem more sensitive because weaker signals maintain the same volume as the strongest signals, while they are a bit quieter on the S350, but when you turn up the volume on the S350 to compensate, the resulting reception is the same. This is a point easily missed when comparing radios. The E-5 was definitely a notch lower in AM sensitivity…the weak signals were not only lower in volume but also had a higher noise level. You can also note some asymmetry in the IF filters of these radios…that is to be expected at this price point. This is most noticeable when center tuning on a given frequency seems a bit different in Wide mode than in Narrow. Botht he Redsun and Eton S-350 show some error when center tuning by ear…not a big issue, just something to be aware of. But in general, the Wide and Narrow IF bandwidths of each of these radios seemed totally reasonable and useful. It was a bit more finicky to tune the S-350 and S-350DL than either of the digitally-tuned sets, but again, on AM the S-350′s tuning is not hard to live with at all. It’s a bit more touchy on SW as you would expect.

SW Reception: Here there were a few variations from one frequency to the next. I checked several weak to medium strength signals across the SW spectrum. The RP2100 sometimes outpulled both the S-350 and the E-5 noticeably, but on other signals they were virtually identical. Also, the S-350 outperformed the E-5 on 6070 KHz but the reverse was true at 10,000, but in general the RP2100 was the clear winner in this test. Most weak signals sounded best on the Redsun…full audio levels and the lowest background noise. This is one sensitive SW portable.

Also since the S-350 is the only single conversion radio in this comparison, it does suffer from images which the dual conversion Redsun and Eton E-5 do not. This manifests itself as out-of-band images of signals where they should not appear. Potentially these images can interfere with a desired signal, although generally they seem to be most noticeable when tuning between bands – they do not generally ruin reception of the major international broadcasters. It is important to note that the RP2100 eliminates the images without sacrificing sensitivity which is sometimes the case with less efficient dual conversion designs.

FM Reception: Here again the Redsun excelled. In my suburban location the FM dial is crowded and the number of stations I can receive is often more a matter of selectivity than sensitivity. However there are some out of town signals which are at the threshold of audibility which is a good test for pure sensitivity. The RP2100 was the best of this group on both counts. The E-5 was second and the S-350 the least sensitive or selective. The Redsun seemed to be able to deliver more clean signals with no noise or interference problems.

Second test: Redsun RP2100 versus Eton E-1. Admittedly an odd combo to compare…the E-1 sells for $500 and is loaded with performance-enhancing and convenience features not found on the Redsun RP2100 – they simply are a different class of receiver. However, I was curious to see how they might compare on the basic parameters of performance: whip sensitivity, sound quality and general ease of use. It seemed fair and I was surprised at what I found.

On SW the Redsun was noticeably more sensitive than the E-1. Many signals had a quieter noise floor and greater apparent sensitivity. On AM the comparison changed depending on the ambient RF noise levels. Inside my home, with typical levels of background noise, the Redsun was decidedly better on AM…the E1′s whip antenna received considerably more interference making weaker signals unpleasant to listen to. However, outside on the deck where the noise was gone, the E-1 proved itself to be slightly more sensitive on AM then the Redsun…weak and medium strength daytime signals from 100 or more miles away had a quieter noise floor on the E-1…it’s AM is great off the whip when there is little RF interference. Incidentally, I noticed that the E-1 emits some RF interference of its own which I could hear on the Redsun until I separated them by about 2 feet.

The Redsun also proved to have better audio than the E-1. Although I like the sound of the E-1, the RP2100 has a wider frequency response, with more warmth and impact to the sound. And of course, the Redsun also has a handle, making it far easier to carry around than the E-1 which lacks one. Hmmm.

Please don’t construe this to mean the Redsun is overall a better radio than the E-1…that is not my feeling at all. The E-1 excels at virtually every other measure of performance in areas such as dynamic range/overload rejection, filter symmetry and shape, tuning ease and accuracy, memory capacity and organization, SSB, synchronous detection, passband tuning, XM Satellite capability and on and on and on. In many cases the E1 will deal with hard to hear signals far more effectively rendering many signals clearly you will not be able to hear on the Redsun, especially with external antennas. But be aware that for conventional listening off the built-in antennas, the Redsun has its own areas of superiority and that alone is amazing given the price differential separating these two.

AM Reception versus the GR SR II, SR III, & Panasonic RF-2200: The GE SR’s and Panasonic RF-2200 are among the hottest of all AM portables ever made. They also have very big sound for their size, which is a bit larger than the other radios we’ve been talking about here. I found the Redsun was every bit the equal of the SR III and only a hair less sensitive than the venerable SRII and RF-2200. Those two radios provided a slightly lower noise floor on weak to medium strength signals, but still this is excellent AM performance. The Redsun also gives you the benefits of two IF bandwidths and digital accuracy so no apologies for AM performance are needed…the Redsun is only one notch below these highly respected radios on the AM band which means it is better than most of what’s out there.

Quality Control: I was fortunate to have three samples at my disposal to compare for uniformity. I am glad to report that I could determine absolutely no operational differences among them which is outstanding in this class of equipment. Down to the tiniest details they all operated identically and this is encouraging, especially for a first production run of a new company’s very first model…outstanding!

CONCLUSIONS
Redsun has burst upon the World Band Portable scene in a very positive way with their new RP2100. This radio offers absolutely superb overall performance within the limitations I’ve explained for under $100 delivered from China. It offers powerful audio, great RF sensitivity on all bands, two well-chosen bandwidths for AM and SW, a convenient handle, many power options, a feel of solidity and quality and fairly simple operation once you get used to it.

Negatives include lack of a keypad for direct frequency access, dim and awkward to use illumination, the FM Mono issue and some spurious noises when tuning via the knob. Eliminating the last vestiges of those noises would go a long way to increasing the enjoyment of this radio. It is very possible that future production runs may address some of these issues. It would also be nice to see a US Import version with a 120 Volt AC Input and a US warranty.

So…is the Redsun RP2100 everything the Eton/Grundig S-350 series is not? In many ways, yes it is – no drift, easier tuning, better SW sensitivity, better AGC and slightly bigger sounding audio. The latest S-350 radios offer a slightly controversial “Tuning Lock” circuit which does reduce drifting compared with earlier versions but also gives up some of the naturalness of analog tuning, because you often find the lock circuit fighting you as you try to make minor tuning corrections. Some users prefer the earlier models without the lock. The S-350 series does offer styling some may prefer to the Redsun which although pleasing to me does look somehow less sleek than the S-350DL. The S-350DL also offers a much brighter, snappier looking LCD display and illumination along with true analog tuning which eliminates the spurious noises you hear when tuning the Redsun and that alone can be very important to some users. So I’m not going to throw out my S-350 yet. To S-350 or S-350DDL owners who may be wondering if it is a worthwhile upgrade to grab a Redsun I’ve got to say it depends on how much you like radios and are willing to own several to suit your whims. Performance differences are not so night and day that it obsoletes the S-350, but the Redsun does make real improvements in just about every area of performance, most notably SW sensitivity and ease of tuning. Whether or not they justify purchasing another radio… that choice will be up to you.

And to the folks at Redsun, a great big, “Thank You” and “Way To Go Guys!!!” Your first radio is a winner.

Comments or questions? Email me at jay@radiointel.com

Jay Allen

*End Note: Buying Chinese Radios Through eBay:

Both of the eBay sellers I mentioned earlier are highly reliable; I have purchased many radios this way and have never had any problems. There are a few things you should be aware of however.

First, these radios require 220 volts for AC operation. You can use a 120 volt to 220 volt step-up transformer which these sellers can provide…for ultimate peace of mind you could obtain one locally to get one with UL approval. Or you could use an external wall wart…the Redsun has a DC input jack for this.

Perhaps more importantly however is that you do not get a US Warranty. In the relatively unlikely event you do receive a defective unit (I have gotten one sub-standard sample out of about 30 radios purchased this way), you would have to pay to ship it back to China for a replacement…either that or chalk it up to bad luck and purchase another…which decision is most valid depends on the price of the radio. These radios cost about $55 and shipping with insurance is about $40. In this case it would cost you about $38 to return the radio for replacement assuming the seller would pay to ship the replacement to you, so it’s worth it. Remember: when and if these Chinese radios are eventually imported officially by a US Distributor (not all of them are) you can expect to pay roughly twice as much to get that US Warranty. At this moment no one knows if the Redsun will be imported to the US or not.

Chinese vs English

Above photo courtesy of Fernando @ Fenu-Radio.ch

Review source: http://www.radiointel.com/review-redsunrp2100.htm

Sanyo Eneloop Batteries Power Pack provided for review by DepotEco.com To Read the Full Review please Click the CPFReviews.com Banner above.

General Description:

Sanyo Eneloop is a special type of low self-discharge nickel-metal hydride (LSD NiMH) rechargeable battery first introduced by Sanyo in November 2005. Eneloop batteries are one of the most environmentally friendly and long lasting batteries available to consumers. Sanyo Eneloop is backed by revolutionary technology that separates itself from the conventional NiMH Batteries. Sanyo Eneloop cells have considerable advantages over the conventional NiMH Battery. It overcomes a major disadvantage (high self discharge) of conventional NiMH Battery. A conventional NiMH Battery can be charged only up to 500 times and looses about 10-15% of its charge on the first day itself. In contrast the Sanyo Eneloop retain up to 85% of its charge even after one year. Not only that but they can be recharged up to 1000 times. DepotEco.com offers an excellent deal on this environmentally friendly Sanyo Eneloop Power Pack. Sanyo Eneloop ready to use Power Pack is a super saver, very economical pack with loads of accessories. It mainly consists of all the types general purpose batteries you will ever need. The pack contains 8, yes that’s right EIGHT standard AA sized cells and 4 standard AAA sized Sanyo Eneloop cells. Accessories include one 4 bay overnight charger, two C size cell adapters and two D size cell adapters.

Let’s have a detailed look at some of the features, advantages and disadvantages of Conventional NiMH and LSD NiMH Batteries.
Conventional NiMH Battery:

The main cause of high self discharge rate for conventional NiMH Battery is mainly because of the positive electrode reduction reaction due to dissolved negative electrode material, decomposition of the positive electrode and “shuttle effect” of nitrogenous compounds. Researchers at Sanyo found out that the self discharge mechanisms can be significantly suppressed by using a super lattice Hydrogen absorbing alloy that is free from Co & Mn as a negative electrode and by improving the material used for separator. More improvements were achieved by change in electrolyte from KOH to NaOH rich electrolyte. All this gave birth to a totally new type of rechargeable NiMH batteries. Commonly called as low self discharge nickel-metal hydride i.e. LSD NiMH. Due to the low self discharge, cells are often marketed as pre-charged or ready to use rechargeable batteries.

Sanyo Eneloop LSD NiMH features all the advantages of conventional NiMH Battery over and above here are typical features of Eneloop LSD NiMH battery.
Sanyo Eneloop LSD NiMH Battery:

Inside Sanyo Eneloop Power Pack ‘suit case’, a well organized, beautiful white colored blister type content holder secures all the contents nicely. The container is divided in to three sections. Placed centrally is a 4 bay charger. Four Sanyo Eneloop AA batteries are placed on either side of charger along with one C size & one D size battery adapter. Four AAA sized cells sit just below the charger. Overall the available space utilized in almost optimum configuration. Printed copy of charger manual is also included. It’s hiding behind the charger.

Sanyo NiMH Battery Charger: The charger included in Sanyo Eneloop Power Pack is 4 bay overnight charger. The charging current per channel is about 300 mA for AA sized Eneloop Battery where as it is 150 mA for AAA sized battery. The charger is designed to charge cells in pairs. It takes about 10 hours to fully charge the Eneloop NiMH AA Battery. The charge time may vary depending upon battery condition and temperature. The LED indicators placed at the bottom most portion of charger inform user the state of the cells. Flashing LED’s imply cells are currently charging. When the cells are fully charged, LED’s are in steady state switched ON position. No LED glow means either the battery is inserted incorrectly or power is switched off or there is no battery inserted. Here are a few pictures of charger.

On back side of Sanyo 4 bay charger, you will notice a foldable wall plug; no wires to worry for. Below the foldable wall plug, there is embossing of important information about the charger. The Sanyo NiMH charger is specified as “Class 2″ charger with Model #NC-MQN06. Charger accepts input range of 100 to 240 Volts AC at 50/60 Hz. It typically consumes 8 Watts of power. The output charging current for Sanyo Eneloop 4 bay charger is 300 mA for AA cell and 150 mA for AAA cell. There is a precautionary note informing user to read instructions carefully before using the equipment. The charger is designed to charge NiMH type cells only. The charger is manufactured in China by Sanyo Electric Co., Ltd.

How to Charge using the included 4 bay Sanyo NiMH Charger
Note: These instructions are taken straight from the charger manual.

1) This charger is designed to charge 2 or 4 pcs of AA or AAA NiMH rechargeable batteries. AA and AAA batteries can be charged at the same time.
2) If you want to charge 4 pcs of AA or AAA, put batteries into the charger compartments, taking care to observe polarity (+/-) as indicated inside the charger.
3) If only charging 2 batteries at a time, place the batteries in the left or right side compartments of the charger.
4) Swing plug out and plug into AC100-240V outlet.
5) Confirm that the indication lights begin to flash. Do not plug in upside down. If plugged in upside down, it will finish charging before it is fully charged.
6) When charging is complete, the indicator lights will turn on constantly. Refer to charging chart for typical charge time.
7) After charging is done, unplug the charger from the outlet and swing plug back into place.

Complete charger manual can be downloaded from www.eneloopusa.com

Sanyo NiMH Battery Size Comparison: From Left to Right arranged are AAA sized Sanyo Eneloop Battery, AA sized Sanyo Eneloop Battery, C Cell Adapter & D Cell Adapter.

Test Results :

Sanyo Eneloop AA Batteries Testing Basis: Minimum specified capacity for Sanyo Eneloop AA sided batteries is 1900 mAH where as typical capacity is 2000 mAH. For this, out of 8 AA Sanyo Eneloop Batteries supplied, 4 batteries were randomly selected for the 1 Amp (1/2 C) current draw test and remaining 4 were selected for higher 2 Amp (1C) current draw. Normally, the manufacturers rate the cells at 1/5 C or 0.2 C where capacity of cells appears to be more. But the 0.2 C test is relatively impractical considering the applications in which these cells will be used. Normally, for the typical applications of Sanyo Eneloop Batteries, the current draw is of the order of 1Amp or more.

1 Amp Test : As Sanyo ships cells pre-charged to 75%, for the 1 Amp test, it is required to charge the cells completely before testing. So, all 4 batteries were charged overnight prior to performing the test. It should be noted that this was the first charging of cells. i.e. Forming charge/discharge cycles were not performed. These tests were carried out using West Mountain Radio CBA II. Here are the test results.

Noted that since the cells were not given forming charge/discharge cycles, there exists variation in the capacities. Yet, all 4 cells performed quite well; in fact none of the cells were below 1800 mAH. Even after just a single charge, the cells performed within the specifications. This is an achievement in itself. Especially considering the 1 Amp (1/2 C) discharge.

2 Amp Test : The remainder of 4 Eneloop cells were subjected to three charge discharge forming cycles. The 2 Amp (1 C) current draw test was then performed and here are the results.

Combined Test Results : Here are the combined test results. You can see how closely capacities match for 1 Amp (1/2 C) and 2 Amp (1 C) test indicating excellent performance of Sanyo Eneloop Batteries.

Advanced Tests : More tests to follow soon.

Buy Sanyo Eneloop Batteries Power Pack Here. ]]> http://www.depoteco.com/eneloop-review/feed/ 2