YESOO Extended Battery (4300mAh), Cover, TPU Case For Samsung Galaxy S3 III GT-I9300 + Exclusive Black And Green Color Key Chain Kit (Black Cover, Yellow TPU) Cell type: Lithium-ion Voltage: 3.7V Capacity: 4300mah Battery life will vary depending on your specific hardware and software configurations and network conditions. Precise Cutouts Give Full Access To All Ports.