Dtk Extended Laptop Notebook Battery Replacement for LENOVO IBM Thinkpad E40 E50 0578 E420 E425 E520 E525 L410 L412 L420 L421 L510 L512 L520 Sl410 Sl510 T410 T420 T510 T520 W510 W520 10.8V 7800MAH Battery type: Li-ion; Capacity: 6600mAh; Cells: 9-cell; Voltage: 11.1V. Compatible Models: LENOVO ThinkPad E40 E50 Edge 0578-47B Edge 14" 05787UJ d 14" 05787VJ 14" 05787WJ Edge 15" E420 E425 E520 L410 L412 L420 L421 L510 L512 L520 SL410 2842 SL410 2874 SL410k 2842 SL510 SL510 2875 SL510 T410 T410i T420 T510 T510i T520 T520i W510 W520. Compatible Part Numbers : 42T4235 42T4708 42T4714 42T4733 42T4756 42T4764 42T4798 42T4803 42T4819 42T4848 42T4911 51J0499 57Y4185 57Y4545 ASM 42T4703 42T4752 42T4794 42T4702 All DTK products are Certified by CE, FCC for safety. Strict guidelines for compatibility, and standards compliance for environment safety. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery Operation time for standard batteries(9-cell, 6600mah): Around 3 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support, 12-month hassle-free guarantee LENOVO ThinkPad E40 ThinkPad E50 ThinkPad Edge 0578-47B ThinkPad Edge 14&#034; ThinkPad Edge 14&#034; 05787UJ ThinkPad Edge 14&#034; 05787VJ ThinkPad Edge 14&#034; 05787WJ ThinkPad Edge 14&#034; 05787XJ ThinkPad Edge 14&#034; 05787YJ Thinkpad Edge 14&#034; 0578F7U ThinkPad Edge 15&#034; ThinkPad Edge E420 Thinkpad Edge E425 ThinkPad Edge E520 ThinkPad Edge E525 ThinkPad L410 ThinkPad L412 ThinkPad L420 ThinkPad L421 ThinkPad L510 ThinkPad L512 ThinkPad L520 ThinkPad SL410 2842 ThinkPad SL410 2874 ThinkPad SL410 series ThinkPad SL410k 2842 ThinkPad SL510 2847 ThinkPad SL510 2875 ThinkPad SL510 series ThinkPad T410 ThinkPad T410i ThinkPad T420 ThinkPad T510 ThinkPad T510i ThinkPad T520 ThinkPad T520i ThinkPad W510 ThinkPad W520 42T4235 42T4708 42T4714 42T4731 42T4733 42T4737 42T4737 42T4753 42T4756 42T4757 42T4757 42T4763 42T4764 42T4798 42T4803 42T4819 42T4848 42T4849 42T4850 42T4851 42T4852 42T4911 42T4911 42T4912 51J0499 51J0499 51J0500 57Y4185 57Y4186 57Y4545 ASM 42T4703 ASM 42T4752 ASM 42T4756 ASM 42T4794 ASM 42T4796 FRU 42T4702 FRU 42T4751 FRU 42T4755 FRU 42T4791 FRU 42T4793 FRU 42T4795 FRU 42T4797 FRU 42T4817 FRU 42T4819 overheating protection overcurrent protection overvoltage protection overcharge protection over discharge protection short circuit protection Cells QTY9 Voltage(V)10.8V Capacity7800mAh/73Wh ColorBlack Dimension217.3*76.6*22.1mm N.W.455g TypeLi-ion