Hyperion LG Thrill 4G 3500mAh Extended Battery with for AT&T LG Thrill 4G (Also Compatible with LG Optimus 3D) Compatible with LG Thrill 4G/Optimus 3D. Distributed by Hyperion EA. All batteries come with a 3 Month Warranty. 3500 mAh Battery Capacity (with Extended Back Cover). Batteries use "A" Grade Lithium Ion Cells.