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source : http://www.engadget.com/2009/11/09/powergenix-nizn-rechargeable-aa-batteries-finally-some-cells-w/

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.

DepotEco Introduces PowerGenix  AA Nickel-Zinc High Yield Technology Batteries, (IN STOCK NOW!)

Earlier this year, PowerGenix’s NiZn technology was certified by the RBRC for collection and recycling, becoming only the fifth rechargeable chemistry recognized by the program.  PowerGenix’s NiZn batteries contain no toxic heavy metals such as lead, cadmium or mercury and are the most recyclable rechargeable chemistry on the market.

Nickel and zinc are among the Earth’s most abundant elements, found virtually everywhere in our daily lives. These natural elements are found in the earth, in the food you eat and in a wide variety of products. Both elements are readily recyclable and many products on the market today come from these recycled supplies.

About Nickel

Nickel has many uses from construction materials to food preparation, but its many favorable characteristics make it an excellent choice in the use of high powered rechargeable batteries. For more information on nickel, its many uses and its metallurgical properties, visit the Nickel Institute.

Zinc Facts

Zinc’s unique properties allow it to be used in an array of products from cosmetics, to baby powder, to precision parts for automobiles, airplanes and appliances. The International Zinc Association notes that one of the most useful characteristics of zinc is its resistance to atmospheric corrosion. The ranking of zinc in the electromotive series of metals (an indication of a metal’s tendency to oxidize, or give up electrons) positioned below magnesium and aluminum but above cadmium, iron, nickel and hydrogen, make it an exceptional material to use in conjunction with nickel when designing a battery. The electronegative characteristics of zinc have made it a popular choice in a variety of primary (single use) battery technologies for many years.

Recyclability

More than 6.5 million metric tons of zinc slab, oxides, powders and dusts are consumed each year in the Western World, two million of which come from recycled zinc. In the United States, the Bureau of Mines estimates that with enhanced recovery, recycled zinc will ultimately account for more than 40% of the total amount of zinc used

Meanwhile, nickel’s resistance to corrosion means that when most nickel-containing products are eventually discarded, they are still intact and easily identifiable (e.g., a kitchen sink made of stainless steel). This aids in the collection and sorting of nickel-containing products for recycling.

Sustainability

While abundant, both nickel and zinc are finite resources. However, their innate characteristics and recyclability assure environmentally sensitive availability for long-term development. Unlike many other materials nickel and zinc can be recycled again and again while maintaining their physical and chemical properties. There remains the same amount of each element at the end of a particular product cycle as at the beginning.

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