4200mAh USB Backup Extended Battery Power Charger Pack Kickstand Case For Samsung Galaxy S4 I9500 - White With Silver built-in rechargeable li-polymer battery for Samsung Galaxy S IV S4 i9500 Compact size design makes it easy to carry with LED Indicators to remind you how much juice you've got left Features a kickstand with which to prop your phone up and watch movides or use other multimedia easily Long cycle life, rapid charge,safe and repliable