[Steve Chamberlin] has a spiffy solar-charged 12 V battery that he was eager to use to power his laptop, but ran into a glitch. His MacBook Pro uses Apple’s MagSafe 2 connector for power, but plugging ...

This lead acid battery charger circuit is designed in response to a request from Mr.Devdas .C. His requirement was a circuit to charge two 12V/7AH lead acid batteries in series.Anyway he did not ...

With endless summer days still aplenty, there’s no better time to invest in a solar charger for all your gadgets. However, Joshua Zimmerman of the DIY site Instructables doesn’t think you need to ...

So the power's out, and you've broken out the candles to keep things well-lit—but your phone's about to die too, with no working wall outlet in sight! DIY weblog Tinkernut shows us how to power your ...

I tell ya, when the zombie apocalypse sweeps over this planet, we’ll all be in a world of hurt. I mean, aside from avoiding zombies trying to munch our brains, how will we charge our precious portable ...