We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular laptop battery with label showing 57Wh 10.8V

KingSener

KingSener T440P 57Wh 10.8V laptop battery

SKU CH-3G1C-DFYXA MPN T440P

57 Wh 10.8 V lithium-ion replacement battery with six Japanese cells fits Lenovo ThinkPad T440P, T540P, W540, W541, L440 and L540 models

  • Battery Voltage10.8V
  • Battery Capacity57WH / 5200mAh
  • 57Wh capacity extends unplugged work time
  • 8V Li-ion chemistry delivers stable power output
  • Compatible with ThinkPad T440P T540P W540 W541 L440 L540
  • Replaces OEM part numbers 45N1144 through 45N1779
  • Six Japanese cells built to original dimensions

Replacement battery for Lenovo ThinkPad

The KingSener T440P is a 57Wh lithium-ion battery built for Lenovo ThinkPad T440P, T540P, W540, W541 and L440 models. It replaces original part numbers including 45N1144, 45N1145, 45N1148, 45N1149, 45N1150, 45N1151, 45N1152, 45N1153, 45N1158, 45N1159, 45N1160, 45N1769 and 45N1779. The six-cell pack matches the original dimensions for direct installation.

Compatibility and capacity fit

This unit suits owners of the listed ThinkPad series who need a 57Wh replacement that fits the existing battery bay. Buyers whose laptops require a different voltage, a higher 100Wh capacity or a nine-cell form factor should look elsewhere. Systems outside the named model range will not accept this pack.

10.8V 57Wh specification

The battery delivers 10.8V and 57Wh (5200mAh) from six Japanese cells. This voltage and capacity combination determines whether the pack will power the target ThinkPad models for the expected runtime.

Highlights

  • 57Wh capacity extends unplugged work time
  • 8V Li-ion chemistry delivers stable power output
  • Compatible with ThinkPad T440P T540P W540 W541 L440 L540
  • Replaces OEM part numbers 45N1144 through 45N1779
  • Six Japanese cells built to original dimensions

Specifications

BrandKingSener
ModelT440P
Part Number45N1144
45N1145
45N1148
45N1149
45N1150
45N1151
45N1152
45N1153
45N1158
45N1159
45N1160
45N1769
45N1779
Battery Voltage10.8V
Battery Capacity57WH / 5200mAh

Questions about this item

How do I verify the 57Wh battery is working correctly after installation?

The system should report a full charge capacity of 57Wh and provide stable run time matching the design capacity.

What comes in the box and what must I purchase separately?

The KingSener T440P replacement battery is supplied as a single 6-cell Li-ion unit; no cables, tools or adapters are included.

Should I choose the 57Wh 6-cell or the 100Wh 9-cell version for my ThinkPad T440P?

The 57Wh 6-cell matches the original size and weight, while the 100Wh 9-cell adds capacity but extends beyond the chassis.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.