Coming from USB Fever is the linguistically logical USB Universal External Portable Rechargeable Battery. Unlike previous solutions the UUEPRB (for short-ish) is extremely portable measuring just 72 x 28 x 21mm and weighing a meagre 45g – compare this to the Recharge4 which came in at 250 x 170 x 90mm and 360g with its battery adding a further 120g.