All-day computing is a reality (up to 10.5 hours) when combined with the ThinkPad X60 Series 8 Cell High Capacity Battery (40Y7005) or the ThinkPad X60 Series Tablet 8 Cell Li-Ion Battery (40Y8318) on select systems. The unique ThinkPad X60 Series Extended Life Battery provides up to 2.6 hours of battery life. It connects to the bottom of the ThinkPad X60 and X60 Tablet Series notebook via the ThinkPad X6 / X6Tablet UltraBase connector. The extended life battery keeps you unplugged longer and provides an integrated look and fit when you're on the move. (Note: The extended life battery cannot be used in or with the ThinkPad X6 or X6 Tablet UltraBase.) The extended life battery can also be used with ThinkPad X60 Series 4 Cell Enhanced Capacity (40Y7001) or ThinkPad X60 Series 4 Cell Slim Line (40Y6999) or the ThinkPad X60 Series Tablet 4 Cell Li-Ion Battery (40Y8314) system batteries.