I recently stumbled on a growing group of electronics hobbyists who are scavenging 18650 lithium ion batteries from laptop batteries to build sizable Tesla-style powerwalls. They're often paired with ...

Discover how to make a homemade battery capable of charging your smartphone using simple materials like copper foil, aluminum ...

It's expensive replacing batteries for devices that don't have an AC adapter socket, but if you've got a little time you can make your own AC-powered "batteries" that will power your device without ...

With the recent proliferation of residential solar energy, there is growing interest among general consumers who are looking for ways to store extra energy without ...