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Main image of 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

Alt view image 2 of 7 - 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

Alt view image 3 of 7 - 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

Alt view image 4 of 7 - 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

Alt view image 5 of 7 - 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

Alt view image 6 of 7 - 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

Alt view image 7 of 7 - 44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

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44Wh 45N1742 45N1743 Laptop Battery for Lenovo ThinkPad T550 T550s T560 W550 W550s P50S 20CJ 20CK 20FH 20FJ 20E1 20E2 20FL 20FK Series 45N1740 45N1741 00NY639 SB10K12721 Notebook Battery

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SpecificationsBattery Type: Li-ion; Voltage: 11.4V; Capacity: 44Wh/3900mAh; Battery life: Up to 500 recharge cycles over the life of the battery.
Compatible Part NumberReplacement for 45N1740 45N1741 45N1742 45N1743 SB10K12721 00NY639 3ICP/7/61/70 3ICP7/62/66 Laptop Battery.
Compatible Laptop ModelsCompatible with Lenovo ThinkPad T550 T550s T560 W550 W550s P50S Series Notebook Battery.
Quality Assurance100% new from manufacturer, every battery has passed factory testing, grade A cells ensure fast charges and low power consumption, built-in circuit protection ensures both safety and stability. CE / FCC / RoHS Certified for safety.
Perfect After-saleWelcome to email us if you have any issues, questions or concerns, we promise to resolve the problem within 24 hours. We guarantee 30 days money-back and 12-month warranty.

Overview

Specs

Reviews

Specifications:
Battery Type: Li-ion
Voltage: 11.4V
Capacity: 44Wh/3900mAh
Certificate: CE,RoHS,FCC
Condition: 100% New from Manufacturer, Grade A Cell

Compatible Part Numbers:
45N1740 45N1741 45N1742 45N1743 SB10K12721 00NY639 3ICP/7/61/70 3ICP7/62/66

Compatible Laptop Models:
Lenovo ThinkPad T550 Series

Lenovo ThinkPad T550s Series

Lenovo ThinkPad T560 Series

Lenovo ThinkPad W550 Series

Lenovo ThinkPad W550s Series

Lenovo ThinkPad P50S Series

Additional Information
First Listed on Newegg	January 09, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

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

Return for refund within: 30 days
Return for replacement within: 90 days
This item is covered by E-Transit Limited Return Policy

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Item#: 9SIC4RTKRK2110