• Instantly and accurately shows if battery is good or needs replacing
• Eliminate guesswork and wasted batteries when your device isn't functioning properly
• Fits all sizes of button and coin-style batteries; alkaline, silver oxide or Lithium
• Great for cameras, watches, remote controls, hearing aids, key fobs or other small electronics
• The tool that pays for itself by preventing just one wasted battery!

The average American family spends hundreds-of-dollars each year on replacement batteries for the dozens-and-dozens of battery-powered devices we use everyday. Many of those batteries are wasted because when a device stops functioning, we automatically replace the batteries--only to find out the problem was with the device, not the battery. Chances are, both batteries--the good battery that wasn't the problem and the new battery--end up lost or spending the rest of their useful lives rolling around in a drawer somewhere; especially painful since small button coin batteries often cost as much as the device they power! This ingenious device eliminates that expensive waste by clearly showing the charge condition instantly. Best of all, it does it without needing it's own battery! Overall dimensions 4"L x 2"W x 1"H 2 oz. One-year warranty and Jack's Tool Shed worry-free Satisfaction Guarantee.