ThinkPad X30 Series Extended Life Battery

All-day computing is a reality (up to 8 hours on select systems) when combined with system battery with the ThinkPad X30 Series Extended Life Battery. This unique battery can be added to the bottom of the ThinkPad X30 notebook to provide up to 8.0 hours of computing on select models. Its clever design includes a bar that extends below the battery to tilt the system to a more ergonomic typing angle. At only one lb, it's easy to carry extra battery power anywhere you go.

Lenovo LI-ION EXTENDED LIFE, Battery