New 100% OEM Compatible Li-Ion Rechargeable Battery Pack. A-Grade Battery Cell. This battery works wonderfully with, but not limited to the following notebook or tablet models:

ThinkPad E40

ThinkPad E50

ThinkPad Edge 0578-47B

ThinkPad Edge 14"

ThinkPad Edge 14" 05787UJ

ThinkPad Edge 14" 05787VJ

ThinkPad Edge 14" 05787WJ

ThinkPad Edge 14" 05787XJ

ThinkPad Edge 14" 05787YJ

Thinkpad Edge 14" 0578F7U

ThinkPad Edge 15"

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 series

ThinkPad SL410 2842

ThinkPad SL410 2874

ThinkPad SL410k 2842

ThinkPad SL510 series

ThinkPad SL510 2847

ThinkPad SL510 2875

ThinkPad T410

ThinkPad T410i

ThinkPad T420

ThinkPad T510

ThinkPad T510i

ThinkPad T520

ThinkPad T520i

Best replacement for the following OEM battery part numbers:

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.