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.
this is my next computing-related purchase. i already get 4 hours out of the current battery, and it spoiled me. gone are the days running from outlet to outlet. that is a whole 9-5 without one recharge. impressive.