The iBattz Mojo Vogue removable battery case retails for $89.99 and comes with two 1700mAh rechargeable batteries.
More after the break.

The Vogue is a very customizable battery case that comes with three color backs and two color bumpers that all add up to a case that will change with you. With the Vogue and the USB battery charger say good by to tethering your iPhone to the wall wile it charges. I like the fact the each one of the 1700mAh batteries will charge your iPhone and virtually triple your battery life. If you are looking for a slime battery case that have lots of color variations and the ability to stay mobile longer than the iBattz Mojo Vogue is the case for you.
available here
iBattz