Yes I know that the iPhone has a built in battery and you cant just replace it like that. But the clever thing is to get the iPhoneck Backup Battery, which just hooks up from the bottom and powers up the built-in one, when you run out of juice. It can charge up to 60% of your iPhone's battery life and fits flush in from the bottom side, without disturbing the design too much. It's available for $35.21.

Full story: newlaunches.com