Best extended battery cases for the iPhone 5
Well, it just doesn't try to do it, as it's hard to be done. Instead, you put on a slim Presto hardshell case that protects the iPhone 5, and when you need extra juice, you just slide the slim case into another one with embedded 2,500 mAh battery, that more than doubles your handset's battery life.
The Power Case is coming soon with no price attached yet, but Tylt has a battery case for the Galaxy S III, and with a kickstand at that, which runs for $79.99, so the iPhone 5 one shouldn't be far off.
The case has two versions - the one with the kickstand costs $89.99, and the one without is 10 bucks less, while both are coming in February.