The Universal Wrist Charger is a rechargeable lithium-ion battery pack with a mini-USB output and 1,500mAh capacity. This charger is available at ThinkGeek for $35. It comes with nine chargers – PSP, DSi, iPhone, both Nokia adapters etc. The charger will charge you device while use it. Get one, you might need one of this sometime during traveling.

[via LikeCool]