We put a wide range of alkaline batteries through our testing to find the longest-lasting options. From standard AAs to 9-volts, we conducted discharge tests and calculated the cost per battery to ...

A built-in battery tester and handle ensure you can take juiced-up batteries anywhere you need to, plus the waterproof, durable shell can handle hard knocks. If you never store C, D, or 9-volt ...

There’s no shortage of conflicting messages on what to do with your dead alkaline batteries, which include AA, AAA, C, D and 9-volt. Governments and battery makers don’t have consistent and ...

We don’t always have the answers, but we have some people on speed dial who do — which is why we present to you our FYI series where we have experts explain if lip balm is actually bad, how ...

The first lead-acid battery was made of a few pieces ... something they’d rather not do. Are 9-volt batteries as different from AAA batteries as you think? Take a look inside.

This four-slot charger measures battery capacity, voltage, internal resistance, and charge time. It can charge AA, AAA, AAAA, and C batteries, including NiMH and some lithium-based batteries ...

There’s also the popular AA and AAA ... battery, the more it holds–and the sizes of the devices they power. Sometimes, you may find alkaline batteries sold in rectangular shapes, like common 9 ...

There’s also the popular AA and AAA ... battery, the more it holds – and the sizes of the devices they power. Sometimes, you may find alkaline batteries sold in rectangular shapes, like common ...