AAA to D Battery Shells

• Great for emergencies when you never seem to have the right size battery
• Model: ZT1610385

The ZIOTEK battery upsizer consists of three "shells" that nest together like Russian dolls. Each shell converts a smaller size battery to the next larger standard size. Using all three shells at once, you can actually make an AAA battery fit a D-cell application. Caution: Do not use Battery Upsizers in a battery charger. If you use multiple battery upsizers, do not use batteries of different types at once or new and used batteries together.