Lenovo 0A36303 Thinkpad Battery 70++, L & T Series, 9 Cell High Capacity: Features and Advantages Technology utilizing lithium-ion (Li-Ion) 9-cell system battery 94 Wh of battery energy (Watt-hours) The ThinkPad External Battery Charger (40Y7625) is compatible. Compatible with the following: L410, L412, L420, L421, L430, L510, L512, L520, and L53; T410, T420, T430, T510, T520, T530, W510, W520, W530