I have an iPod Touch 2nd generation that I want to turn into a bump battery for my iPhone 5s. How can I do it? p.s. Please don't give me other suggestions about whatI can do with this device, I've got a zillion old iDevices that are already being used in all the alternate usage scenarios that're possible, and this Touch is ancient, can only run up to iOS 4.2, has only 8 GB storage, has a very cracked screen, etc. etc. It really has no other good use to me besides as a bump battery.