Product Information :
Lenovo ThinkPad Notebook battery (0A36283)
Manufacturer's product description
Stay unplugged longer with ThinkPad Battery 29 (4 cell), ThinkPad Battery 29+ (6 cell) and ThinkPad Battery 29++ (9 cell). These rechargeable batteries use Lithium-Ion (Li-Ion) technology and can be used as replacement for aging system batteries or as a convenient spare battery.