If a device stops working, it can be tough to tell if its battery has died or the product itself. There are easy ways to rule ...

A battery tester can serve this exact purpose. Battery testers come in various shapes and sizes and can be used for different types of batteries. However, when it comes to small batteries ...

and the jump-starter’s battery tester was the first feature we used to confirm the Champion 590-cold-cranking-amps cell in Black Beauty was indeed very dead. See All 13 Photos Operating the jump ...