Stay unplugged longer with ThinkPad Battery 55+ and ThinkPad Battery 55++. 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 & Benefits: - Lithium-Ion (Li-Ion) technology - Six-cell, rechargeable system battery, 57Wh - Standard system battery specifications - Over-discharge protection
