The lenovo thinkpad battery 47 allows you to increase the capacity of your 4 cell system battery on selected models or extend your unplugged computing time by carrying a spare it is compatible with the x200 and x201 systems and the design allows it to be in a system connected to the thinkpad x200 ultrabase the 6 cell rechargeable battery utilises advanced lithium ion li ion technology to create an efficient and balanced power source the current is 108 volts and 52 ampere hours the ove