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  Lenovo ThinkPad X1 Battery 42T4939

Lenovo ThinkPad X1 Battery

List Price: $169.00
Our Price: $99.90
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Lenovo ThinkPad X1 UltraBook Battery

This is the internal battery for the first generation Lenovo X1 Ultrabook. This laptop battery replacement is 100% compatible with the original battery specifications and is individually tested and backed by a 1 year warranty. This battery is internal to your laptop and will need to be installed. It is not a difficult task to replace the battery. One simply removes the 4 screws on the corners on the bottom of the laptop chassis.

There are 4 different X1 UltraBook 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. Sometimes the type number is the first portion of your serial number. On some models the Type number will simply say Type follow by 4 numbers as listed below.

This battery fits:
Type 1286
Type 1291
Type 1293
Type 1294

Replaces these Lenovo battery part numbers:


  • Brand:
  • Voltage:
  • Battery Capacity:
  • Battery Type:
  • Cell Origin:
  • Color:
  • Assembly Origin:
  • Warranty:
  • Guarantee:
  • Useful Life:
  • Xtend Lenovo battery
  • 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

You can expect about 4-5 hours of run time with this computer battery when new, depending on your energy use. It is possible to get much longer run time with this battery, however this requires setting your screen at a much dimmer setting and disabling wireless and other functions on your laptop that consume power.

Like all Li-ion primary batteries, your run time will decline over time.

This battery replaces the Lenovo ThinkPad X1 internal embedded laptop battery.

Laptop Battery Express only deals with brand new premium computer batteries. We never carry recycled or used batteries. We only use the highest quality cells inside the battery pack so you will have a long service life (300-500 recharge cycles). We do not use cheaper battery cells which can wear out in a little as 6 months. Our inventory turns rapidly and you will always receive a freshly manufactured battery.

Compatible Laptop Chargers:
Slim Tip AC adapter for Lenovo Laptops 20 Volts 4.5 Amps
Our Price: $49.00

AC adapter for Lenovo Slim Tip

Compatible with the following laptop models:

Lenovo Laptop Batteries > ThinkPad X1