Seidio Innocell Extended Life Battery for T-Mobile HTC G1 Fits in existing space so no replacement door is needed Made from the highest quality Japanese cells Capacity: 1400mAh 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: T-Mobile HTC G1 Made from the highest quality Japanese cells More capacity in the same form factor Fits in existing space so no replacement door is needed Perfect replacement for your original battery