3800mah High Capacity Replacement Battery for Samsung Galaxy S3 I9300 From USA Utra-high capacity lithium-ion battery Has an integrated microchip that prevents overcharging and lengthens battery life Hybrid of power & stable. No memory effect and environmental friendly Perfect replacement of Samsung Galaxy S3 i9300 Please Note: Please take the yellow tape off near the electrode when use it. The battery must be fully recharged before use