As you know battery life is serious problem for all of us.
I bought an external battery "energizer xp1000" Its really slim and nice and also cheap (at least 3 times cheaper than the original battery in my country)
You can charge many devices such as mp3 player, ipod etc.
http://www.amazon.com/Energizer®-XP...OQWS/ref=sr_1_1?ie=UTF8&qid=1311774007&sr=8-1
I bought an external battery "energizer xp1000" Its really slim and nice and also cheap (at least 3 times cheaper than the original battery in my country)
You can charge many devices such as mp3 player, ipod etc.
http://www.amazon.com/Energizer®-XP...OQWS/ref=sr_1_1?ie=UTF8&qid=1311774007&sr=8-1