Product Review

Compatible Models: ( Ctrl + F for fast search ur laptop model)
Lenovo ThinkPad R400, R400 7443, R61 Series (14.1" widescreen) R61 7732, R61 7733, R61 7734, R61 7735, R61 7736, R61 7737, R61 7738, R61 7742, R61 7743, R61 7744, R61 7751, R61 7753, R61 7754, R61 7755, T400, T400 2764, T400 2765, T400 6473, T400 7417, T61 Series (14.1" widescreen) T61 1959, T61 6377, T61 6378, T61 6379, T61 6480, T61 6481, T61 7658, T61 7659, T61 7660, T61 7661, T61 7662, T61 7663, T61 7664, T61 7665

Compatible Part Numbers:
41U3198, 43R2499, 42T4533, 42T5265, 42T4530, 42T4532, 42T4548, 42T4644, 42T4645, 42T4677, 42T4678, 42T4743, 42T4745, 42T4771, 42T5262, 42T5264.

Specification:
Battery type: Li-ion
Voltage: 11.1V (Compatible with 10.8V)
Capacity: 5200mAh / 4400mAh
Cell: 6 Cells
Recharge cycles: 500
Operation time: 1.5-2.5 hours