With recharge times as quick as 75 minutes to 80%, Ernie Ball guarantees that these batteries deliver a “consistent, ...

In this article, I will take apart a Li-ion alternative to the classic 6F22 9V battery. This battery is a Chinese 9V/500mAh USB rechargeable Li-ion battery (sold under the brand name infinite). The ...

So, what do you do when your Arduino project needs to operate in a remote area or as a portable device? There are LiPo battery shields available, and although they may work well, recharging requires ...

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 ...

Sure you could go buy a USB charger off the shelf, but what fun would that be? Try making one yourself with a little help from a 9V battery and a few extra components. This simple hack on a standard ...

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 ...

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 ...