Lenovo 42T4937 Battery This Lenovo 42T4937 battery is manufactured to be 100% to the original Lenovo battery specifications. Each Lenovo brand battery is backed by a 1 year warranty and 30 day money back guarantee. This Lenovo 42T4937 battery is compatible with the Type 1286, 1291, 1293 and 1294 ThinkPad X1 UltraBook laptop models. The model number can be found on the bottom of your laptop next to "Type" followed by four digits. This battery IS NOT compatible with the ThinkPad X1 carbon models. There are 4 different X1 ThinkPad Laptops and they all use a different battery.
You can confirm that this is the correct battery by checking the type number listed on the bottom of your laptop chassis. It should match with "42T4937" or another part number listed below. Sometimes the type number is the first portion of your serial number. On some models the Type number will simply say Type followed by 4 numbers as listed below. Tech Specs Xtend Brand; 14.8 Volts; 2.63 Ah or 39 Whr; 4 Cell Li-ion; Samsung (South Korea); Black; Assembled in China; 1 Year Warranty; 30 day full satisfaction guarantee; 300-500 recharge cycles; Replaces these
ThinkPad models: Type 1286 Type 1291 Type 1293 Type 1294 Replaces these
ThinkPad X1 battery part numbers: 42T4939 42T4977 42T4938 42T4937 42T4936 4ICP7/39/95 41CP7/39/95 You can expect about 4-5 hours of run time with this ThinkPad 42T4937 battery when new, depending on your energy use. You can get longer run time by dimming your screen brightness and closing unused programs.