Is it possible? I know lithium ion batteries are rechargeable, and I've got a few 3V lithium ion coin cells (two I pulled out of a calculator, and one's from an old watch). Since usually people just throw these away and buy new ones, are they rechargeable? Or is there something that prevents me from charging them? If it means anything, two are marked "Panasonic CR2025" and one is marked "Maxell CR2016." Also, if they are rechargeable, how would I charge them?