Hack a Day favorite [Mikey Sklar] is back with a new project. Mini-D is a battery desulfator. If a 12V lead-acid battery sits with a voltage below 12.3V, sulfur crystals will begin to form on the ...

Powered by a strong 12V lithium-ion battery, the Theragun Mini delivers up to 120 minutes of continuous massage therapy on a single charge. For typical users who spend 15-20 minutes per session ...

But they’re also forgivable. With a smart 12V trickle charger and maintainer, you can revive your car battery in a relatively short amount of time. And this one from GPED is discounted to $20 on ...