Originally Posted by 12swinm
I would avoid making any of your own external batteries. The last thing you want to do is mess up you iphone. This is my favorite it is the only one that I found that didn't mess with the iphone's signal
I gave up on that idea very quickly, once I realized that there were external batteries already available. I'm new at this.
Does anyone know the capacity of the 3Gs's battery? Would it be possible to replace it at some point in the future?