ThinkPad X40 4-Cell Li-Ion Battery-ThinkPad X40 4-Cell Li-Ion Battery OEM

This 4 Cell Battery is the smallest and lightest ThinkPad X40 Series system battery Accessory gives you up to 3.5 hours battery life It replaces the original 4-cell system battery Carries an extra to stay unplugged longer Compatible design allows it to be in the system when the system is connected to ThinkPad X4 UltraBase Dock Longer computing is a reality (up to 6.7 hours) on select systems when you combine the ThinkPad X40 Series 4 Cell Li-Ion Battery with the optional ThinkPad Ultrabay Slim Li Polymer Battery in the ThinkPad X4 UltraBase Dock Battery enclosure type: Plug-in module Voltage provided: 14.4 V Min operating temperature: 41 F Max operating temperature: 95 F Humidity range operating: 8 - 95 1.75 inches deep x .50 inches high x 8.13 inches wide