Seidio Innocell 3500mAh Extended Life Battery for Sprint Google Nexus S 4G - Retail Packaging - Black Adds 0.7cm to your device and comes with a black replacement door to accommodate the larger size of the battery Comes with a black replacement door featuring Seidio's signature soft touch coating Capacity: 3500mAh To obtain the full capacity of your battery, leave the battery/your phone on the charger for an additional 2-3 hours after the charging indicator turns green or the battery status shows full. For use with: Google Nexus S 4G (Sprint)