Be the first to review this item and earn 25 Rakuten Super Points™
Stay unplugged longer. Get twice the capacity of the 4-cell system battery and up to 7.5 hours of battery life on select systems. This high capacity battery has an extended area on the back edge and fits in the standard ThinkPad X40 Series system battery slot. Designed so ThinkPad X40 Series system fits in the ThinkPad X4 UltraBase dock.