3GS Extra Battery ??

[bigmoss]

Hey guys is the In Case Slider the best option for an extra external bettery for the Iphone 3GS ? I want to carry something to extend my battery and would like some suggestions on what others are using for the 3GS, I found a few on ebay but after email the seller I am told they only work with the 3G and not the 3GS.

If the In Case Slider is the best can someone recommend an ebay seller they have used who has a great price

Thanks

[phoneboi]

morphie juice pack !

[Kala123]

You should check out Imaxpower's External Battery Pack for iphones. It extends your battery life by 400%. You can check out yourself at iPhone Battery Life Pack, 3g External Backup, Battery Extender iTouch