Lenovo ThinkPad X60 Series Notebook Battery
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Stay unplugged longer. Get twice the capacity of the 4-cell system battery and up to 7.9 hours of battery life on select systems. This high capacity battery has an extended area on the back edge and fits in the standard ThinkPad X60 Series system battery slot. Its compatible design allows it to be in the system when the system is connected to the optional ThinkPad X6 UltraBase.