|  | | | | | | ThinkPad X40 Series 8 Cell Li-Ion Battery | | | 
| | | Stay unplugged longer. Get twice the capacity of the 4-cell system battery and up to 7.5 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 X40 Series system battery slot. Its compatible design allows it to be in the system when the system is connected to the optional ThinkPad X4 UltraBase Dock. All-day computing is a reality (up to 10.7 hours*) on select systems when you combine the ThinkPad X40 Series 8 Cell Li-Ion Battery with the optional ThinkPad Ultrabay Slim Li Polymer Battery in the ThinkPad X4 UltraBase Dock.
| | | Features & Benefits: | | |
• Twice the capacity of the 4-cell system battery and up to 7.5 hours* of battery life to stay unplugged longer
• Designed so ThinkPad X40 Series system fits in the ThinkPad X4 UltraBase Dock.
• Backed by IBM Service and Support
• *(These model numbers achieved eTesting Labs, Inc's BatteryMark 4.0.1, or the Ziff Davis Media Inc.'s Business Winstone 2002 BatteryMark Version 1.0, Battery Rundown Time of at least the time shown. This test was performed without independent verification by the VeriTest testing division of Lionbridge Technologies, Inc. ("VeriTest") or Ziff Davis Media Inc.; neither Ziff Davis Media Inc. nor VeriTest makes any representations or warranties as to these test results. Winstone is a registered trademark and BatteryMark is a trademark of Ziff Davis Publishing Holdings Inc., in the U.S. and other countries. A description of the environment under which the test was performed is available at http://www.ibm.com/pc/ww/thinkpad/batterylife. Battery life (and recharge times) will vary based on many factors including screen brightness, applications, features, power management, battery conditioning and other customer preferences.)
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