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 ...

I came across a Gizmodo post with an eye-catching photo of a disemboweled 9V battery – apparently taken from the ... But calculating out the volume, the AAA battery comes in at .21 cubic in vs. the ...

[VA3NGC] had a better idea: he built a reproduction B battery from a wooden box, some brass hardware, a nixie tube power supply, and a 9V battery ... of how there’s more to vintage restoration ...

This battery is a Chinese 9V/500mAh USB rechargeable Li-ion battery (sold under the brand name infinite). The compact battery has an integrated USB MICRO-B socket which allows you to replenish energy ...

For example, 9V ... batteries contain a collection of smaller batteries. For manufacturing reasons this makes sense. It’s also handy if you’re building a project and need to tweak your power ...