What is the best iPhone 3g portable USB charger?

[Mortagon]

Hello, I'm going to be getting an iPhone on Monday and don't think its battery life will be sufficient for my regular usage. What is the best portable USB charger that can be uesd with iPhone to increase battery life, and by how much does it increase the battery life? The longer the better, and portability is definately a factor. Thanks

 

[kes601]

Hello, I'm going to be getting an iPhone on Monday and don't think its battery life will be sufficient for my regular usage. What is the best portable USB charger that can be uesd with iPhone to increase battery life, and by how much does it increase the battery life? The longer the better, and portability is definately a factor. Thanks

I bought this http://www.radioshack.com/product/i...e+battery&kw=iphone+battery&parentPage=search a while ago for my iPod Touch, never used it. But, I was in Chicago on vacation last week and used it with my iPhone. I got 4 full charges out of it(iPhone was down to less than 20% and the cheap charger I bought off eBay would not charge it when down this low). Anyway, this battery worked great.

 

[Mortagon]

4 full extra charges sounds great, and the price is very nice too. Sounds good, thanks