KingSener T440P 57Wh 10.8V laptop battery
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 voltage rating10.8 V
- Battery capacity57WH / 5,200 mAh
- 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.
How it compares
Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.
- Price $29.99
- Typical for this category: the median of 27,790 items is $30.99.
Specifications
| Product | |
|---|---|
| Brand name | KingSener |
| Model name | T440P |
| Part number | 45N1144 45N1145 45N1148 45N1149 45N1150 45N1151 45N1152 45N1153 45N1158 45N1159 45N1160 45N1769 45N1779 |
| Power | |
| Battery voltage rating | 10.8 V |
| Battery capacity | 57WH / 5,200 mAh |
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.
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