Samsung Galaxy S III Standard Battery (2100mAh). Samsung uses the latest Lithium Ion battery technology giving you the best performance possible. This Lithium Ion battery is designed specifically for your Samsung Galaxy S3 mobile phone to deliver the most reliable and long lasting power. The Galaxy S III 2100 mAh battery is also NFC-enabled, letting your phone communicate with other devices and accessories equipped with NFC technology. Advisable to charge full before first usage.