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.

Features and Benefits:

- Lithium-Ion (Li-Ion) technology
- Nine-cell, rechargeable system battery, 94Wh
- Standard system battery specifications
- Over-discharge protection