Batterytec&reg; Laptop battery for LENOVO THINKPAD T410 T420 T430 T430i T510 T520 T530 T530i W510 W520 W530 L410 L420 L430 L510 L520 L530 SL530 42T4733 42T4235 42T4731 45N1001 70++.[10.8V 4400mAh, 1 Year Warranty] Battery Type: Li-ion, Cells: 6-cell,Capacity: 4400mAh; Voltage: 10.8V. 100% New Manufacturer. To 500 charging cycles during the lifetime of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12 months warranty without problems. Class A cells provide fast loads and low power consumption, chip protection offers both security and stability.