I have a broken iPhone charging case with a good battery in it, and an identical (but not broken) case with a worn out battery. I took both cases apart, hoping I could swap the practically new battery into the old case. Unfortunately, the battery doesn't just plug in: it needs two itsy-bitsy little wires to be soldered. It looks like something that would take about 5 minutes for someone who has a soldering iron handy and knows how to do it properly, but that's not me. Any volunteers?