fromZDNET
6 days agoI use a lot of batteries, and this handy device is saving me money - here's how
The device itself needs two alkaline AAA batteries to work -- and a set are provided to get you going. Using the tester is easy. The hardest part if figuring out which slot fits which battery, because if you get it wrong, it'll give you an inaccurate measure of how much power remains. Once you've figured out where your battery goes, push the positive end into the slot and use the probe to touch the other end
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