TechOrbits Battery Samsung Galaxy Tab 3 8.0" T310 T311 T4450E AAD508JS/7-B - 3 Years Warranty- 4550mAh Longest Warranty: TechOrbits batteries are built to last; that's why we cover our batteries with an industry best 3 years warranty. Premium Components: Our batteries are beautiful on the inside and out! This battery features a Texas Instrument main board, state of the art over circuit protection, and highest grade li Polymer Cells. Energy Efficiency: Max Utilization Technology insures that the battery is always in-sync with your power settings to give you maximum battery life for every charge. Over 1 million+ happy customers since 2010 Technical Specs: 4450mAh; 3.8 Volts; Li-Polymer Cells; 1000+ lifetime charge cycles