PowerSkin Spare Rechargeable Battery Case for Samsung Galaxy S4 - Retail Packaging - Black
The PowerSkin Spare, just as the name suggests, offers spare power to get you through the day. The Spare provides the extra power you need - for the power drainer, big screens on today's smartphones - all cleverly tucked into an easy-to-Snap-On/off protective shell, providing the thinnest rechargeable battery case available yet.