Laptop/Notebook Battery Replacement for IBM ThinkPad X200, X201, ThinkPad Elite X200, X200s, 42T4536, 42T4537, 42T4538, 42T4540, 42T4543 (4400mAh / 49Wh) 11.1 Volt Li-ion Laptop Battery. 30-Day Money Back Guarantee. 1 Year Warranty. This battery is not compatible with the ThinkPad X200 Tablet version. The battery will protrude out the (bottom/side) of the laptop and will cause your laptop to sit at an angle. You may not be able to connect to a docking station with the extended battery.