Is your battery overheating? Does it not hold a charge or fail to charge completely. Bets are that you need a new battery. Lenovo batteries are very easy to replace. If you looking at your computer the battery is located on the bottom rear of the system. It is held in place by two locks one is springed. Simply open up the locks, slide your batery out and replace. For the first time make sure you fully charge your new ThinkPad battery.
US $47.99