Since I’m starting to use more 9V rechargeable batteries, I thought it would be a good idea to build a simple 9V rechargeable battery for my friendly guitarist instead of having to urge him to look ...

If you’ve ever gotten into electronics hacking, you’ve probably had the illusion of most gadgets ruined for you. For example, 9V batteries are basically just six AAAA batteries taped together. As ...

MIAMI (WSVN) - Strong storms, like Hurricane Irma, can cause power loss potentially for days. Luckily, there is a “hurricane hack” that shows a way to charge your smartphone via a 9-volt battery. In ...

When you’re building your own custom electronics projects, a simple power switch isn’t always easy to find. If you have some DIY projects that use 9V batteries, this super small power switch is fairly ...

CLEVELAND -- Stranded on the side of the road with a dead car battery and a dead cell phone? Not if you keep a 9-volt battery handy in your glove compartment. It's possible to revive a dead cell phone ...

Smartphones are more powerful than ever, but they still have an annoying tendency to run out of juice just when you need them most. The Kickstarter-backed Plan V could get you out of such a fix, as it ...

While raising money on Kickstarter in 2014, a big part of the elevator pitch for Roost -- a startup based in Sunnyvale, California -- was that its Wi-Fi-enabled smoke alarm battery would forever ...

Old American radios (and we mean really old ones) took several kinds of batteries. The A battery powered the filaments (generally 1.5V at a high current draw). The B battery powered the plate (much ...