IBM High Capacity Li-Ion Battery for ThinkPad Lithium-Ion (Li-Ion) 10.8V rechargeable battery

TP T40Ser HighCap LiIon Batt Up to 1/3 more capacity than the standard system battery. This high capacity battery has an extended area on the back edge and fits in the standard ThinkPad T40/R50 system battery slot. Its compatible design allows it to be in the system when the system is connected to Dock II, Mini-Dock, and Port Replicator II and it can be recharged with the new, optional, external ThinkPad Multiple Battery Charger II. All-day computing is a reality (up to 8 hours on select systems)* when you combine the ThinkPad T40/R50 Series High Capacity Li-Ion Battery with the optional ThinkPad Ultrabay Slim Li Polymer Battery. *These model numbers achieved eTesting Labs, Inc's BatteryMark 4.0.1 Battery Rundown Time of at least the time shown. This test was performed without independent verification by eTesting Labs, Inc; eTesting Labs, Inc. makes no representations or warranties as to these test results. BatteryMark is a trademark of Ziff Davis Publishing Holdings Inc., an affiliate of eTesting Labs 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.