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New L20D4P73 54.7Wh 15.36V 4-Cell Li-ion Battery for Lenovo ThinkPad X13 Gen 2 (20WK/20XH) Gen 3 (21BN/21BQ) Replaces L20M4P73 L20C4P73 Grade A Cells
- True 54.7Wh Capacity No Fake Labels Many sellers advertise 54.7Wh but ship lowcapacity 45Wh batteries with counterfeit stickers. This L20D4P73 delivers genuine 54.7Wh / 3564mAh you get the real runtime for your ThinkPad X13.
- Exact Fit for ThinkPad X13 Gen 2 & Gen 3 Compatible with Lenovo ThinkPad X13 Gen 2 (Types 20WK, 20WL, 20XH, 20XJ) and ThinkPad X13 Gen 3 (Types 21BN, 21BQ, 21CM, 21CN). Replaces OEM part numbers L20D4P73, L20M4P73, L20L4P73, L20C4P73, L20C4P74, L20D4P74, L20C3P72, L20D3P72, and many SB10/5B10 variants. Direct swap.
- 54.7Wh 15.36V 4Cell Li-ion High energy density for allday productivity. No more unexpected shutdowns at 2030% or performance throttling when unplugged. Ideal for business travel, remote work, or campus use.
- Premium Grade A Cells Built to Last Manufactured with brand new Grade A Liion cells, not recycled or lowgrade. Expect stable voltage, consistent discharge, and 500+ cycle life. No swelling, no false battery gauge.
- Safe & 100% Tested Builtin overcurrent, overvoltage, overheating, and shortcircuit protection. Each unit tested before shipping. Backed by 30day money return and 12month warranty.
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Overview
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Why You Need a Genuine 54.7Wh Battery for Your ThinkPad X13
Lenovo ThinkPad X13 Gen 2 and Gen 3 are ultraportable business laptops designed for productivity. But even the best batteries degrade after heavy use shorter runtime, sudden shutdowns, or the dreaded Consider replacing your battery warning. Worse, many compatible batteries online are fake: they use lowcapacity cells (often 45Wh or less) and slap a 54.7Wh sticker on them. Your laptop runs for half the time, and youve been cheated.
This L20D4P73 battery is different. We deliver a true 54.7Wh / 3564mAh capacity using brand new Grade A Liion cells. What you see is what you get.
Designed for Lenovo ThinkPad X13 Gen 2 & Gen 3
This battery is a direct fit for the following models (Ctrl+F to search):
ThinkPad X13 Gen 2: Types 20WK, 20WL, 20XH, 20XJ
ThinkPad X13 Gen 3: Types 21BN, 21BQ, 21CM, 21CN (including 21BN-A003CD)
Important: These laptops may also be compatible with slightly different capacity batteries (e.g., 48Wh or 60Wh in some configurations). Please verify your original battery part number before ordering.
Specifications You Can Trust
| SpecificationDetail | |
| Model | L20D4P73 (compatible) |
| Chemistry | Liion |
| Voltage | 15.36V |
| Capacity | 54.7Wh / 3564mAh (true capacity) |
| Cells | 4Cell |
| Color | Black |
| Condition | Brand new Grade A cells |
Compatible Part Numbers (Partial List)
| Common P/N |
| L20D4P73 / SB10W51956 / 5B10W51855 |
| L20M4P73 / SB10W51954 / 5B10W51853 |
| L20L4P73 / SB10W51953 / 5B10W51852 |
| L20C4P73 / SB10W51955 / 5B10W51854 |
| L20C4P74 / SB10W51821 / L20D4P74 / SB10W51822 |
| L20C3P72 / SB10W51959 / 5B10W51858 |
| L20D3P72 / SB10W51960 / 5B10W51859 |
What a Cheap or Fake Battery Costs You
- Short runtime Laptop dies halfway through the workday or a long flight.
- Fake capacity Label says 54.7Wh, but actual is 45Wh or less.
- Swelling Dangerous bulging that can crack the palm rest or bottom case.
- Performance throttling CPU slows down to prevent random shutdowns.
What Our Battery Delivers
| FeatureCheap GenericOur GenuineSpec Battery | ||
| True Capacity | 45Wh or less (fake label) | 54.7Wh (tested) |
| Cells | Recycled or lowgrade | Brand new Grade A |
| Runtime (light use) | 56 hours | 810+ hours |
| Swelling Risk | High within months | Low, proper BMS |
| Warranty | None or 30 days | 30day return + 12 months |
Who Is This Battery For?
- Business professionals needing allday battery for travel and meetings.
- Remote workers on backtoback video calls.
- Students moving between classes without charging.
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.
- CONTACT
Return Policies
- Return for refund within: 30 days
- Return for replacement within: 30 days
- This item is covered by AyeFlow Return Policy
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