ok so i just recently bought an iphone 4, and about to get rid of my ipod touch as i dont feel the need to be carrying both around with me all the time. i listen to alot of music and gererally use my phone most of the day. havnt had any big problems with battery life allready but guess that as soon as i start using is to listen to music each day battery life will drain abit, any suggestions on good portable battery chargers i can pick up in the or ship to the uk? cheaper the better but dont really mind paying abit extra for a decent one