Numerous gadgets, from remote controls to hearing aids, depend on small batteries. It’s vital to know when these batteries are close to being drained so they can be substituted before they’re fully ...

A while ago, I came across the BT-168 Battery Tester. It seems to be cheap and widely available. Because I wanted to see what’s inside, I decided to order one from an online seller, and managed to get ...

Clore’s Model BT900 battery load tester from Christie provides testing for 12V batteries using a 300-amp load to simulate vehicle cranking. The tester is designed to assess battery state of charge, ...

Paul Rako takes a look back at the transformer-based prototype built by the legendary Jim Williams and his compatriot Mark Thoren, which relates well in today’s burgeoning EV environment. 1. This is ...