New 10.8V 4400mAh 6-Cell Li-ion Battery for Lenovo ThinkPad T410 T420 T510 T520 W510 W520 L420 L421 SL410 SL510 Replaces 42T4791 42T4751 42T4235 Grade A Cells 12-Month Warranty

Designed for Lenovo ThinkPad & Edge Series

This battery is a direct fit for the following models. Use Ctrl+F to search for your specific model:

Series Compatible Models
ThinkPad T Series T410, T410i, T420, T510, T510i, T520, T520i
ThinkPad W Series W510, W520
ThinkPad L Series L410, L412, L420, L421, L510, L512, L520
ThinkPad SL Series SL410, SL410k, SL510
ThinkPad Edge Series E40, E50, E420, E425, E520, E525
Others 0578-47B, 05787UJ, 05787VJ, 05787WJ, 05787XJ, 05787YJ
Replaces OEM part numbers (partial list):

Common P/N
42T4235, 42T4702, 42T4708, 42T4714, 42T4731, 42T4733, 42T4737, 42T4751, 42T4753, 42T4755, 42T4756, 42T4757, 42T4763, 42T4764, 42T4791, 42T4793, 42T4795, 42T4797, 42T4798, 42T4803, 42T4819, 42T4848, 42T4849, 42T4850, 42T4851, 42T4852, 42T4911, 51J0499, 57Y4185, 57Y4545

Specifications

You Can Trust

Specification Detail
Model 6-cell standard battery (75/75+ series compatible)
Chemistry Li-ion
Cells 6Cell
Voltage 10.8V (fully compatible with 11.1V systems)
Capacity 4400mAh / 48Wh
Cycle Life Up to 500 recharge cycles
Weight Approx. 311g
Dimensions 206.64 × 55.84 × 20mm
Color Black
Safety Standards CE, FCC, RoHS
Condition Brand new Grade A cells
Warranty 30day return + 12month warranty
What a Cheap or Failing Battery Costs You

Short runtime Your laptop dies after 12 hours of light use.

Performance throttling CPU slows down to prevent random shutdowns.

Swelling Dangerous bulging that can crack the palm rest or bottom case.

System errors Battery not recognized warnings and inaccurate battery percentage readings.