Here's a handy hint that might help someone. I have a Nokia phone which I haven't used in so long the battery was completely dead, wouldn't even charge. Read up on the internet about 'shocking' it by getting a usb cable of some description, chopping off the appliance connector and touching the wires off the battery - never got around to it to find out if it worked. Anyway told Mr Wishbone about my big plan and he suggested putting battery in fridge - what?? - so I did. I put it in a small plastic bag and left over night. Next day took out battery, put in phone, plugged in - started charging!! So there you have it - phone up and running again.