Seidio Innocell 1500mAh Slim Extended Life Battery for Samsung Galaxy S Epic 4G, Vibrant, Captivate and Focus Fits in existing space so no replacement door is needed Made from the highest quality Japanese Lithium Ion cells Capacity: 1500mAh 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: Samsung Galaxy S Epic 4G/Vibrant/Captivate/Focus Made from the highest quality Japanese Lithium Ion cells More capacity in the same form factor Fits in existing space so no replacement door is needed Capacity: 1500mAh All battery life claims are dependent upon usage patterns, network configuration and many other factors; actual results will vary.