YN4L 3500mAh extended battery for HTC Evo 3D + Black cover Keep your phone powered throughout your busy day with our high-capacity, rechargeable Lithium-Ion batteries. Dont let your cell phone be caught dead without one! An excellent, high-quality replacement for your original battery, great as a spare battery for long meetings, business trips, and vacations! Almost doubles your talk time, browse time, and standby availability with a capacity of 3500mAh! Includes a special, high-capacity extended back cover for your phone. Integrated microchip prevents overcharging and lengthens battery life! Compatible with: HTC Evo 3D Package Contents: 1 extended cell phone battery with 1 extended battery door cover