I've got a mobile phone with a fantastically bad battery life (it's the HTC Touch Diamond...brand new and needs charged twice a day!). I'm looking for a handhelf dynamo USB charger if anyone knows where to get one? Has to be USB as this is what the cable for the mobile phone is. Don't want a solar charger as I'm indoors quite a lot during the day...and I live in Scotland so not exactly blessed with the sun. I tried searching on Google but couldn't find much.....help