Hyperion Samsung Galaxy SIII 4200mAh Extended Battery + Amber Brown Back Cover (Compatible with Samsung Galaxy S III GT-i9300, AT&T Samsung Galaxy S3 Samsung i747, Verizon Samsung Galaxy S3 Samsung i535, T-mobile Samsung Galaxy S3 Samsung T999, U.S. Cellular Samsung Galaxy S3 R530, and Sprint Samsung Galaxy S3 Samsung L710)**NOW WITH NFC** Extend your talk time on your Samsung Galaxy S3. 4200 mAh Battery Capacity (with Amber Brown Extended Back Cover). Batteries use "A" Grade Lithium Ion Cells. NOW WITH NFC! Two year NO HASSLE Warranty