A few DIY tricks and must-read resources for making your lithium-based laptop batteries last
I'm not sure what sparked my battery obsession. Perhaps it was the installation of 3,000 lbs of lead-acid batteries used to power my homestead. Shortly after that, I found myself zapping old Ni-CD based battery packs with a welder to bring the once-dead batteries back to life. Then I began repacking the cells of other household items, including my iRobot vac and my Macbook. Now I regularly visit a local auto supply, combing through batteries for signs of life. My office is littered with a hodge-podge of Ni-CD, lead-acid and lithium-based cells that are patiently awaiting repairs and a new purpose.
Here's what I've learned about keeping batteries in shape, and rehabbing old ones from the junk heap.