Carry a spare ThinkPad X60 Tablet Li-Ion Battery so you can stay unplugged longer!
4 Cell Li-Ion Battery: 40Y8314 (3 hours average battery life )
8 Cell Li-Ion Battery: 40Y8318 (7 hours of system run time)

Battery life (and recharge time) depends on many factors including screen brightness, applications, features, power management, battery condition and other customer preferences.

The ThinkPad X60 Tablet 4 Cell Battery features:
• Lithium-Ion technology
• 14.4 V, 2.0 Ah
• Three-hour average battery life
• Notched design to accommodate tablet screen swivel hinge for notebook or convertible tablet operation
• Standard system battery specifications
• Over-discharge protection
• Product approvals/certifications: CE MARK, CUL, C-Tick, UL-1950$wwwPartNumLookup/_92P1009