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Laptop Battery for Lenovo ThinkPad T440P W540 L540 L440 W541 T540P 45N1144 11.4V 5200mAh 57Wh High Capacity [2-Year Warranty]

Revive Your ThinkPad's Productivity Don't let a failing battery keep you tethered to your desk. This high-capacity 57Wh replacement delivers up to 50% more runtime than standard batteries work, code, or present for hours without searching for an outlet.
Exact Fit for ThinkPad T440P, T540P, W540 & More Compatible with Lenovo ThinkPad T440P, T540P, W540, W541, L440, and L540 series. Replaces OEM part numbers 45N1144, 45N1145, 45N1147, 45N1148, 45N1149, 45N1151, 45N1158, 57+, 0C52863, 0C52864. Direct replacement no modifications needed.
57Wh 10.8V 6-Cell Li-ion Premium Grade A Cells 5200mAh capacity provides extended runtime. Manufactured with premium lithium-ion cells for stable power, consistent performance, and up to 500 recharge cycles. No memory effect charge anytime without capacity loss.
Built-in Multi-Protection Safety Features overcharge, over-discharge, over-voltage, over-current, and short-circuit protection. CE, FCC, and RoHS certified for safety and reliability. Robust 6-cell design ensures long-lasting durability.
100% Tested & 2-Year Warranty Each battery is individually tested before shipment to ensure quality and performance. Backed by a full 2-year warranty and 30-day hassle-free returns twice as long as most sellers.

Overview

Specs

Reviews

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High Capacity & Long Life: 5200mAh / 57Wh ensures up to 500 charge cycles, outperforming standard 4400mAh batteries for extended work sessions.

Details
Battery Type	Lithium-Ion

Additional Information
First Listed on Newegg	July 11, 2026

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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