Gorilla Gadgets STANDARD Battery (S3 Replacement Battery) Made from high quality Li-Ion cells and replacement back cover Compatible with Samsung Galaxy S3 from all major US carriers Near Field Communication (NFC) Technology Enabled Highest tested S3 extended battery capacity (Refer battery capacity testing chart in product photos for details) Delivers 2350mAh out of claimed 2300mAh (Refer battery capacity testing chart in product photos for details)