LENOVO-0A36309--6CELL-BATTERY-81-FOR-THINKPAD
Thinkpad Battery 81+ (6 Cell) Lithium-Polymer (Li-Polymer) technology 6 cell system battery Battery energy (Watt-hours): 44 Wh Thinkpad Battery 81+ (6 Cell) 0a36309 *warning - not used in the T420 or T430 -lenovo model #'s are suffix specific