Now that I have a solar-powered 12V battery, how can I charge my laptop from it? An inverter would seem absurdly inefficient, converting from 12V DC to 110V AC just so I can connect my Apple charger and convert back…
New firmware 0.3.5 is now available for the ADB-USB Wombat! The Wombat is a bidirectional ADB-to-USB and USB-to-ADB converter for keyboards and mice. Connect modern USB keyboards and mice to a classic ADB-based Macintosh, Apple IIgs, or NeXT, or connect…
Sometimes you can have too much of a good thing. Take a look at the growth of residential roof-top solar power in California. For individual customers who are blessed with sunny weather, installing solar panels can be a smart financial…
After more thorough testing of the used LiFePO4 battery that I described in my previous post, I’ve reached the sad conclusion that it’s essentially a worthless piece of junk. Encouraged by stories from mobile-solarpower.com and other sources, I’d hoped this…
My used LiFePO4 battery (lithium iron phosphate) arrived yesterday. Who buys used batteries? I do, apparently. I’ve been putting the battery through its paces to see how much of the original capacity of 45 Ah / 675 Wh still remains.…
What’s the most expensive component in a small off-grid solar setup? You might assume it would be the solar panels, but the cost of panels can be surprisingly low. For many people, the batteries are the single most expensive element…
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