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Main image of 51KD7 L21D4P75 Laptop Battery 49.5Wh Compatible with Lenovo ThinkPad X13s 1st Gen 21BX 21BY Series SB10W51981 5B10W51880 L21C4P73 SB10W51980 5B10W51879 L21M4P76

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51KD7 L21D4P75 Laptop Battery 49.5Wh Compatible with Lenovo ThinkPad X13s 1st Gen 21BX 21BY Series SB10W51981 5B10W51880 L21C4P73 SB10W51980 5B10W51879 L21M4P76

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SpecificationsBattery Model: 51KD7 / Voltage: 7.74V / Capacity: 49.5Wh 6396mAh 4-cell / Color: Black / Condition: Brand New.
Replace Part Number 51KD7 L21D4P75 SB10W51981 5B10W51880 L21C4P73 SB10W51980 5B10W51879 SB11M89882 5B11M90081 L21M4P76 SB10W51979 5B10W51878 SB11M89880 5B11M90079 SB11M89881 5B11M90080
Compatible with Laptop Models For Lenovo ThinkPad X13s 1st Gen (Type: 21BX 21BY) Series.
Purchase SkillsPlease open the back cover of the laptop before ordering and make sure that the original battery model is consistent with the listing. After getting the battery, please install the battery correctly, make sure that the battery connector is firmly connected to the laptop motherboard, and use the original charger to charge the laptop.Discharge the new battery to 5% (not 0%), then charge and cycle 3-4 times to wake up the new battery.
EPYOBW PromiseAll EPYOBW's batteries are certificated by UL/CE/FCC/RoHS. Our batteries are tested by strict quality control standards t

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Specification:
Battery Model:51KD7
Capacity:49.5Wh 6396mAh 4-cell
Voltage:7.74V
Battery Type: Li-ion
Condition:Brand New
Color:Black
Warranty:30-day refund and 12-month warranty.

Replace Part Number:
L21D4P75 SB10W51981 5B10W51880 L21C4P73 SB10W51980 5B10W51879 SB11M89882 5B11M90081
L21M4P76 SB10W51979 5B10W51878 SB11M89880 5B11M90079 SB11M89881 5B11M90080

Compatible Laptop Models: (use ""Ctrl+F"" to find your model quickly)
for Lenovo ThinkPad X13s 1st Gen (Type: 21BX 21BY) series

Notice needing attention:
Not all compatible laptop models are listed or included here.
You can open the back of your laptop to check the original battery model number. Please contact us online if you have any question for the compatibility.

Additional Information
First Listed on Newegg	July 22, 2026

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Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Joltia Return Policy

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Item#: 9SIC515M1V7354