Will higher capacity batteries be available for iPhone?
As with iPod, different options for batteries from third parties will likely become available. Apple is very likely already using the highest capacity batteries available in the size and form factor used in the iPhone. However, if improvements in battery manufacturing yield improvements that were not yet available in older iterations of iPhone, it is likely that third parties could offer higher capacity batteries for iPhone in the future. This was the same case with iPod. Also, external, slim batteries that cover most or all of the back of the phone will also likely become available. Such external batteries would add a small amount of overall thickness, but would conform to the iPhone style and shape while greatly increasing battery capacity. Similar batteries for other smartphone/PDA class devices increase overall battery capacity by twice or more. Some vendors already offer iPhone battery replacements.
