This simple charger and capacity tester, which is built around two inexpensive and widely available modules, provides an ...

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 ...

OSAKA -- Japan's Espec will double its in-house testing equipment for electric-vehicle batteries, anticipating higher demand for its services from manufacturers as the government looks to promote ...