Sprint Hero standard battery

The standard Sprint Hero battery  is of the 1500mAh variety. (That's a unit of measurement for the amount of juice a battery holds. A higher number means a bigger battery.) While 1500mAh is by no means small, having a spare on hand gives you double the web browsing and media consumption!

Sprint Hero extended battery by Seidio

The Sprint Hero extended battery brings more juice -- 3500mAh to be exact.  At 133 percent more power than the standard battery, it's perfect for travelers and for those times when you can't get to a charger.