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Lenovo ThinkPad P14s Gen 3 Replacement Battery 15.48V 3250mAh

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From $88.99 USD $109.99
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Fits Lenovo ThinkPad P14s Gen 3(AMD)21J5000LMZ and compatible 14-inch models; replaces OEM part numbers 5B10W51863, 5B10W51864, 5B10W51866, 5B10W51867, L21C4P71, L21D4P71, L21L4P71, L21M4P71, SB10W51964, SB10W51965, SB10W51967, SB10W51968, SB10W5196B.
15.48V at 3250mAh capacity delivers 50.31Wh; matches factory output for full CPU and display power under load.
Connector sits flush against the system board with a single push-clip latch; orientation marked on the cell matches the socket keying.
We charged this cell in a ThinkPad platform charger and monitored BMS cutoff behavior; voltage remained stable through full discharge without cliff drops.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after every cell swap.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

15.48V

Amp

3250mAh

Lenovo ThinkPad P14s Gen 3 / T14 Gen 3 — 15.48V Li-Polymer Replacement Battery (5B10W51863)

This 15.48V, 3250mAh (50.31Wh) Li-Polymer cell replaces the original battery in the Lenovo ThinkPad P14s Gen 3 (AMD) and ThinkPad T14 Gen 3 (Intel) series, plus over 115 additional ThinkPad variants sharing the same connector and BMS profile. It matches OEM part numbers including L21C4P71, L21D4P71, L21L4P71, L21M4P71, and SB10W51964 among others. Physical dimensions are 280.50 × 87.60 × 6.10mm — confirm these against your existing cell before installing.

  • P14s Gen 3 and T14 Gen 3 platform fitment: These two ThinkPad lines share a common 15.48V four-cell Li-Polymer architecture, the same physical connector, and an identical BMS handshake protocol. That is why a single replacement cell covers both the AMD and Intel variants across this generation.
  • Bench tested on actual hardware: We ran this cell through charge, discharge, and BMS communication checks on ThinkPad P14s Gen 3 hardware. The BMS accepted the cell without fault codes, the charge controller engaged normally, and all four cell groups balanced within spec under load.
  • BIOS learn cycle after installation: After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset its capacity model against the new cell and clears the inaccurate "poor health" or low-capacity warning that appears after every cell swap on ThinkPad hardware.

BIOS reporting battery health as poor immediately after replacement

The ThinkPad BIOS stores charge-cycle count and capacity data in EEPROM on the old cell. When a new cell goes in, the BIOS reads that stored data as mismatched and flags poor health — even though the cell is new. This is not a fault with the replacement battery. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% to trigger the battery learn cycle. After one or two complete cycles, the BIOS recalibrates and the health warning clears.

Laptop shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS reads a state-of-charge percentage mapped to the old cell's discharge profile, so it reports 25% while the actual cell voltage has already hit the BMS low-voltage cutoff. The fix is calibration: discharge fully to hibernate, then charge to 100% without interruption — repeat this two to three times. After calibration cycles, the fuel gauge tracks the new cell's voltage accurately and unexpected shutdowns stop.

Compatible Models

ThinkPad P14s Gen 3(AMD)21J5000LMZ ThinkPad P14s Gen 3(AMD)21J5002JGE ThinkPad T14 Gen 3(Intel)21AH004SED ThinkPad T14 Gen 3(Intel)21AH007VRI ThinkPad T14 Gen 3(Intel)21AH00DUPB ThinkPad T14 Gen 3(Intel)21AH00EFAD ThinkPad T14 Gen 3(Intel)21AH00HBEE ThinkPad T14 Gen 3(Intel)21AH00K7CY ThinkPad P14s Gen 3(Intel)21AK008QIW ThinkPad P14s Gen 3(Intel)21AK0016MH ThinkPad T14 Gen 3(Intel)21AH00C9MN ThinkPad T14 Gen 3(Intel)21AH00CUCX ThinkPad T14 Gen 3(Intel)21AH00FXED ThinkPad P14s Gen 3(AMD)21J50027EE ThinkPad P14s Gen 3(AMD)21J5002SEQ ThinkPad T14 Gen 3(AMD)21CF001RMD ThinkPad T14 Gen 3(Intel)21AH005YFE ThinkPad T14 Gen 3(Intel)21AH0084FE ThinkPad T14 Gen 3(AMD)21CF004CGR ThinkPad T14 Gen 3(Intel)21AH00E3GB ThinkPad T14 Gen 3(Intel)21AH00EPAD ThinkPad T14 Gen 3(Intel)21AH00HKFR ThinkPad T14 Gen 3(Intel)21AH00KEMH ThinkPad P14s Gen 3(Intel)21AKS02L00 ThinkPad T14 Gen 3(Intel)21AH000EMD ThinkPad P14s Gen 3(Intel)21AK0041RK ThinkPad T14 Gen 3(AMD)21CF001WMS ThinkPad T14 Gen 3(Intel)21AH00CHAT ThinkPad T14 Gen 3(Intel)21AH00D2RK ThinkPad T14 Gen 3(Intel)21AH00G5ML ThinkPad P14s Gen 3(AMD)21J5002EMS ThinkPad P14s Gen 3(Intel)21AK0001GQ ThinkPad T14 Gen 3(Intel)21AH007SED ThinkPad T14 Gen 3(Intel)21AH008CPG ThinkPad T14 Gen 3(Intel)21AH00EBCY ThinkPad T14 Gen 3(Intel)21AH00EWML ThinkPad T14 Gen 3(Intel)21AH00J6CX ThinkPad T14 Gen 3(Intel)21AH00L2IU ThinkPad T14 Gen 3(Intel)21AH002LIU ThinkPad P14s Gen 3(Intel)21AK0053MS ThinkPad T14 Gen 3(AMD)21CF0026SP ThinkPad T14 Gen 3(Intel)21AH00CQIW ThinkPad T14 Gen 3(Intel)21AH00DAIV ThinkPad T14 Gen 3(Intel)21AH00GGUE ThinkPad P14s Gen 3(AMD)21J5002NCK ThinkPad P14s Gen 3(Intel)21AK000CIW ThinkPad T14 Gen 3(AMD)21CF003CCK ThinkPad T14 Gen 3(AMD)21CG001BAU ThinkPad T14 Gen 3(Intel)21AH0080ML ThinkPad T14 Gen 3(Intel)21AH008LEE ThinkPad T14 Gen 3(AMD)21CF0048PG ThinkPad T14 Gen 3(Intel)21AH00EJYA ThinkPad T14 Gen 3(Intel)21AH00F5IU ThinkPad T14 Gen 3(Intel)21AH00KAUE ThinkPad P14s Gen 3(AMD)21J50001SC ThinkPad T14 Gen 3(Intel)21AH000ATX ThinkPad T14 Gen 3(Intel)21AH002YPG ThinkPad T14 Gen 3(Intel)21AH00GQGQ ThinkPad P14s Gen 3(Intel)21AK007UEQ ThinkPad T14 Gen 3(Intel)21AH00CYEE ThinkPad P14s Gen 3(AMD)21J5002VZA ThinkPad P14s Gen 3(Intel)21AK000LCK ThinkPad T14 Gen 3(AMD)21CF0043EE ThinkPad T14 Gen 3(Intel)21AH0088MS ThinkPad T14 Gen 3(Intel)21AH009SFE ThinkPad T14 Gen 3(AMD)21CF004GEE ThinkPad T14 Gen 3(Intel)21AH00ESUK ThinkPad T14 Gen 3(Intel)21AH00FCSC ThinkPad T14 Gen 3(Intel)21AH00KRUE ThinkPad P14s Gen 3(AMD)21J50009GE ThinkPad T14 Gen 3(AMD)21CF002VCY ThinkPad T14 Gen 3(Intel)21AH002GRI ThinkPad T14 Gen 3(Intel)21AH0037EE ThinkPad T14 Gen 3(Intel)21AH00GXRI ThinkPad P14s Gen 3(Intel)21AK004WGQ ThinkPad P14s Gen 3(Intel)21AK0083IX ThinkPad T14 Gen 3(AMD)21CF0023EE ThinkPad T14 Gen 3(Intel)21AH00D6MN ThinkPad T14 Gen 3(Intel)21AH00G9GR ThinkPad P14s Gen 3(Intel)21AK0005ZA ThinkPad P14s Gen 3(Intel)21AK000TMN ThinkPad T14 Gen 3(AMD)21CF002GMX ThinkPad T14 Gen 3(AMD)21CF0038GR ThinkPad T14 Gen 3(Intel)21AH008GMD ThinkPad T14 Gen 3(Intel)21AH00AYAD ThinkPad T14 Gen 3(AMD)21CF004PSC ThinkPad T14 Gen 3(Intel)21AH00F1PG ThinkPad T14 Gen 3(Intel)21AH00FLGE ThinkPad T14 Gen 3(Intel)21AH00LPGM ThinkPad P14s Gen 3(AMD)21J5000HEQ ThinkPad T14 Gen 3(AMD)21CF0033PE ThinkPad T14 Gen 3(Intel)21AH002VCX ThinkPad T14 Gen 3(Intel)21AH0048ED ThinkPad T14 Gen 3(Intel)21AH00H7FR ThinkPad P14s Gen 3(Intel)21AK005JCA ThinkPad P14s Gen 3(Intel)21AK008LAT ThinkPad T14 Gen 3(Intel)21AH00DEML ThinkPad T14 Gen 3(Intel)21AH00GLPE ThinkPad P14s Gen 3(Intel)21AK000GGM ThinkPad P14s Gen 3(Intel)21AK0013CY ThinkPad T14 Gen 3(AMD)21CF002QGB ThinkPad T14 Gen 3(AMD)21CF003FYA ThinkPad T14 Gen 3(Intel)21AH009AFE ThinkPad T14 Gen 3(Intel)21AH00BYGP ThinkPad T14 Gen 3(AMD)21CF004CMD ThinkPad T14 Gen 3(Intel)21AJ002SAU ThinkPad T14 Gen 3(Intel)21AH00F9FE ThinkPad T14 Gen 3(Intel)21AH00FTPE ThinkPad P14s Gen 3(AMD)21J50005MX ThinkPad P14s Gen 3(AMD)21J5000QMZ ThinkPad T14 Gen 3(AMD)21CF002RHV ThinkPad T14 Gen 3(Intel)21AH0033MD ThinkPad T14 Gen 3(Intel)21AH005FGQ ThinkPad T14 Gen 3(Intel)21AH00DYPB ThinkPad T14 Gen 3(Intel)21AH00GUED ThinkPad T14 Gen 3(Intel)21AH00HFRK ThinkPad P14s Gen 3(Intel)21AK007XZA ThinkPad P14s Gen 3(Intel)21AK008UMH ThinkPad T14 Gen 3(Intel)21AH00DPMD

Replaces Part Numbers

5B10W51863 5B10W51864 5B10W51866 5B10W51867 L21C4P71 L21D4P71 L21L4P71 L21M4P71 SB10W51964 SB10W51965 SB10W51967 SB10W51968 SB10W5196B

Technical Specifications

Voltage15.48V
Amp Hours3250mAh
Capacity3250mAh
Rate50.31Wh
Net Weight201g /7.09 oz
Gross Weight461g /16.26 oz
Approximate Weight461g /16.26 oz
Dimension 280.50 x 87.60 x 6.10mm

Product Highlights

  • Brand: Lenovo
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My ThinkPad T14 Gen 3 shows 0% or "plugged in, not charging" right after fitting the new battery — what's wrong?

The BMS on these ThinkPads occasionally goes into a protection state during installation if the cell voltage is below the controller's wake threshold. Connect the AC adapter and leave the laptop powered off for 15 minutes — this lets the charge IC trickle-charge the cell past the BMS minimum before a full charge session begins. If the 0% reading persists, boot into the BIOS (F1 at startup), navigate to Config → Power, and run the battery gauge reset from there. That forces the controller to re-handshake with the new cell's EEPROM data.

Windows reports the new battery's design capacity as lower than the 50.31Wh printed on the cell — why don't the numbers match?

The Wh figure Windows reads comes from the EEPROM embedded in the battery's BMS circuit, which stores the rated design capacity at the cell chemistry level. The discrepancy between that value and 50.31Wh is caused by a difference between nominal rated capacity and the actual electrochemical capacity of the specific cell batch — it is not a sign of a faulty or used battery. Run two full calibration cycles (discharge to hibernate, charge uninterrupted to 100%) and the reported full-charge capacity in Windows Battery Report will converge closer to the actual figure. Check by running `powercfg /batteryreport` in an elevated command prompt after the cycles complete.

The charge stops at 80% and won't go higher — is the replacement cell defective?

This is almost always the Lenovo Conservation Mode setting, not a battery fault. ThinkPad firmware includes a BIOS-controlled charge limit that caps charging at 80% to reduce cell stress during long periods on AC power. Open the Lenovo Vantage app, go to Power → Battery Settings, and switch Charge Threshold from "Conservation" to "Normal" or set a custom upper limit of 100%. If Vantage is not installed, the same setting is available under Config → Power in the BIOS. The cell itself has no internal 80% cutoff.

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