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Lenovo ThinkPad P16s Replacement Battery L21D4P72 15.4V

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From $88.99 USD $109.99
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Fits Lenovo ThinkPad P16s Gen 2 Intel 21HK0002VN and replaces OEM part numbers L21D4P72, L21L4P72, 5B10W51868, 5B10W51870, SB10W51969, SB10W51971.
15.4V and 3300mAh chemistry matches the original lithium-polymer cell for this mobile workstation.
Connector slides into the bottom-case battery slot with a single locking tab on the left edge.
We ran a full discharge-to-hibernation cycle then charged uninterrupted to 100% — the BMS handshake completed without fault codes.
After installation, run one full discharge to hibernation-cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
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.

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🔹 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

15.4V

Amp

3300mAh

Lenovo ThinkPad P16s Gen 2 (Intel) — 15.4V Li-Polymer Replacement Battery (L21D4P72)

This is a 15.4V, 3300mAh (50.82Wh) lithium-polymer cell for the Lenovo ThinkPad P16s and P16 Gen 1 and Gen 2 series mobile workstations. It replaces OEM part numbers L21D4P72, L21L4P72, 5B10W51868, 5B10W51870, SB10W51969, and SB10W51971. The cell fits the standard battery bay on both Intel and AMD variants of the P16s Gen 1 and Gen 2 platforms.

  • Cross-platform P16s and P16 Gen 1/Gen 2 fit: Lenovo shared this battery form factor, connector pinout, and BMS handshake protocol across both the Intel and AMD P16s Gen 1 and Gen 2 lineups. The voltage rail and physical dimensions — 316.30 × 111.70 × 5.60mm — are identical across these variants, so one cell covers the full model range.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a P16s Gen 2 Intel unit. The BMS completed authentication with the EC firmware, reported correct Wh capacity to the OS, and held voltage stable under sustained CPU and display load without triggering low-voltage cutoff prematurely.
  • Post-installation learn cycle on the P16s: After fitting this cell, run one full discharge until the laptop hibernates at its low-battery cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning the ThinkPad BIOS routinely displays after any cell swap.

BIOS reporting poor battery health immediately after fitting a new P16s cell

The ThinkPad BIOS reads battery health from EEPROM data stored in the old cell's fuel gauge IC. When a new cell is installed, that EEPROM record is gone, and the BIOS flags the battery as degraded because it has no calibration baseline yet. This is not a fault with the replacement cell. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the fuel gauge IC enough data to write a new baseline. After one or two cycles, the BIOS health indicator resets to normal.

ThinkPad P16s shutting down at 20–30% charge shown on the fuel gauge

This happens when the cell voltage drops below the EC's cutoff threshold under full CPU plus display load before the reported percentage reaches zero — a voltage cliff caused by a degraded cell that cannot sustain current delivery at high draw. A new cell resolves the shutdown, but the fuel gauge IC still needs calibration against the fresh chemistry to track the percentage accurately. Perform the full discharge-to-hibernate cycle once after installation. On the P16s, target a resting voltage of 16.8V at full charge to confirm the cell is within spec.

Compatible Models

ThinkPad P16s Gen 2(Intel)21HK0002VN ThinkPad P16s Gen 2(Intel)21HK000VGM ThinkPad P16s Gen 1(Intel)21BT0085GR ThinkPad P16s Gen 1(AMD)21CK004WTX ThinkPad T16 Gen 1(Intel)21BV00C6MD ThinkPad T16 Gen 1(Intel)21BV00CSIW ThinkPad T16 Gen 1(AMD)21CH003HGR ThinkPad T16 Gen 1(AMD)21CH004FPG ThinkPad P16s Gen 1(Intel)21BT0083RK ThinkPad P16s Gen 1(AMD)21CK0030EQ ThinkPad T16 Gen 2(Intel)21HH004MCY ThinkPad T16 Gen 2(Intel)21HH006PAT ThinkPad T16 Gen 2(Intel)21HH002MUK ThinkPad T16 Gen 1(Intel)21BV00FRSC ThinkPad T16 Gen 1(AMD)21CH001FGR ThinkPad P16s Gen 1(Intel)21BT004DEQ ThinkPad P16s Gen 2(Intel)21HK000HSP ThinkPad P16s Gen 2(Intel)21HK0010CK ThinkPad P16s Gen 1(Intel)21BT008CRK ThinkPad P16s Gen 1(AMD)21CK0052UK ThinkPad T16 Gen 1(Intel)21BV001XGP ThinkPad T16 Gen 1(Intel)21BV00CEMB ThinkPad T16 Gen 1(Intel)21BV00D1TX ThinkPad T16 Gen 1(Intel)21BV009FCX ThinkPad T16 Gen 1(AMD)21CH003RYA ThinkPad T16 Gen 1(AMD)21CH004PMZ ThinkPad P16s Gen 1(AMD)21CK0027AU ThinkPad P16s Gen 1(AMD)21CK0037YA ThinkPad T16 Gen 2(Intel)21HH005FIU ThinkPad T16 Gen 2(Intel)21HH006SIW ThinkPad T16 Gen 1(Intel)21BV00AMGQ ThinkPad T16 Gen 2(Intel)21HH002WGP ThinkPad T16 Gen 1(Intel)21BV0023RI ThinkPad T16 Gen 1(Intel)21BV00G2GQ ThinkPad T16 Gen 1(AMD)21CH002DGM ThinkPad P16s Gen 1(Intel)21BT005KFR ThinkPad P16s Gen 2(Intel)21HK000UAT ThinkPad P16s Gen 2(Intel)21HK001BEE ThinkPad P16s Gen 1(Intel)21BT008LGR ThinkPad P16s Gen 1(AMD)21CK005CRA ThinkPad T16 Gen 1(Intel)21BV00CNPB ThinkPad T16 Gen 1(Intel)21BV00DAMB ThinkPad T16 Gen 1(AMD)21CH004CAT ThinkPad P16s Gen 1(Intel)21BT0007IU ThinkPad P16s Gen 1(AMD)21CK002VGR ThinkPad P16s Gen 1(AMD)21CK003FUK ThinkPad T16 Gen 2(Intel)21HH005FED ThinkPad T16 Gen 2(Intel)21HH0076RK ThinkPad T16 Gen 1(Intel)21BV00AURI ThinkPad T16 Gen 2(Intel)21HH0035MZ ThinkPad T16 Gen 1(Intel)21BV002CRT ThinkPad T16 Gen 1(Intel)21BWS16300 ThinkPad T16 Gen 1(AMD)21CH002XPB ThinkPad P16s Gen 1(Intel)21BT006GIX ThinkPad P16s Gen 2(Intel)21HK0016IU ThinkPad P16s Gen 2(Intel)21HK003YAU ThinkPad P16s Gen 1(AMD)21CK0055UK ThinkPad T16 Gen 1(Intel)21BV0071FR ThinkPad T16 Gen 1(Intel)21BV000QCA ThinkPad T16 Gen 1(Intel)21BV00CWPG ThinkPad T16 Gen 1(Intel)21BV00DKCY ThinkPad T16 Gen 1(Intel)21BV0089FE ThinkPad T16 Gen 1(AMD)21CH004KMS ThinkPad P16s Gen 1(Intel)21BT000FAT ThinkPad P16s Gen 1(AMD)21CK0034EE ThinkPad T16 Gen 1(AMD)21CJ000YAU ThinkPad T16 Gen 2(Intel)21HH0071ZA ThinkPad T16 Gen 2(Intel)21HH007DAD ThinkPad T16 Gen 1(Intel)21BV00AHPE ThinkPad T16 Gen 1(Intel)21BV00B3SP ThinkPad P16s Gen 1(Intel)21BT006QYA ThinkPad T16 Gen 2(Intel)21HH003ECK ThinkPad T16 Gen 1(AMD)21CH0026EQ ThinkPad P16s Gen 2(Intel)21HK0013AD ThinkPad T16 Gen 2(Intel)21HH0008PH ThinkPad P16s Gen 1(AMD)21CK0054RT ThinkPad T16 Gen 1(Intel)21BV0079YA ThinkPad T16 Gen 1(Intel)21BV00D6GP ThinkPad T16 Gen 1(Intel)21BV00DUGE ThinkPad T16 Gen 1(Intel)21BV009XTX ThinkPad P16s Gen 1(Intel)21BT0003MN ThinkPad P16s Gen 1(Intel)21BT000NMH ThinkPad P16s Gen 1(AMD)21CK003CBM ThinkPad T16 Gen 1(AMD)21CH0058VN ThinkPad T16 Gen 2(Intel)21HH006WML ThinkPad T16 Gen 2(Intel)21HH007TIW ThinkPad T16 Gen 1(Intel)21BV0045EQ ThinkPad T16 Gen 1(Intel)21BV00ARED ThinkPad T16 Gen 1(Intel)21BV00BTZA ThinkPad P16s Gen 1(Intel)21BT006YMZ ThinkPad T16 Gen 2(Intel)21HH0031ML ThinkPad T16 Gen 2(Intel)21HH003JTX ThinkPad T16 Gen 1(Intel)21BV0029EQ ThinkPad T16 Gen 1(AMD)21CH002JEE ThinkPad P16s Gen 1(Intel)21BT005PGB ThinkPad P16s Gen 2(Intel)21HK002HKR ThinkPad T16 Gen 2(Intel)21HH0025BM ThinkPad T16 Gen 1(Intel)21BV002PAD ThinkPad T16 Gen 1(Intel)21BV006VRI ThinkPad T16 Gen 1(Intel)21BV00DETX ThinkPad T16 Gen 1(Intel)21BV00F8HV ThinkPad T16 Gen 1(Intel)21BV00A6MN ThinkPad P16s Gen 1(Intel)21BT000BFE ThinkPad P16s Gen 1(Intel)21BT000WCK ThinkPad P16s Gen 1(AMD)21CK004RML ThinkPad T16 Gen 1(AMD)21CH004TTX ThinkPad T16 Gen 2(Intel)21HH007AYA ThinkPad T16 Gen 2(Intel)21HH0082BM ThinkPad T16 Gen 1(Intel)21BV0062ZA ThinkPad T16 Gen 1(Intel)21BV00AYMX ThinkPad T16 Gen 1(Intel)21BV00C2RT ThinkPad P16s Gen 1(Intel)21BT007UIV ThinkPad T16 Gen 2(Intel)21HH0039ZA ThinkPad T16 Gen 2(Intel)21HH004KFR ThinkPad T16 Gen 1(AMD)21CH0032MZ ThinkPad P16s Gen 1(Intel)21BT006MGP ThinkPad P16s Gen 2(Intel)21HK004CIX ThinkPad T16 Gen 2(Intel)21HH002JBM ThinkPad T16 Gen 1(Intel)21BV002WIV ThinkPad T16 Gen 1(Intel)21BV0075ML ThinkPad T16 Gen 1(Intel)21BV00DQBM

Replaces Part Numbers

L21D4P72 L21L4P72 5B10W51868 5B10W51870 SB10W51969 SB10W51971

Technical Specifications

Voltage15.4V
Amp Hours3300mAh
Capacity3300mAh
Rate50.82Wh
Net Weight216g /7.62 oz
Gross Weight476g /16.79 oz
Approximate Weight476g /16.79 oz
Dimension 316.30 x 111.70 x 5.60mm

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

Why does my ThinkPad P16s show the wrong Wh rating in Lenovo Vantage after I swapped the battery?

The Wh figure displayed in Lenovo Vantage and in the BIOS battery screen is pulled from EEPROM data written by the original cell's fuel gauge IC. A replacement cell ships with its own EEPROM values, which may differ slightly from the OEM-rated figure until the fuel gauge completes calibration against the actual chemistry. This is a data mismatch, not a capacity defect. Run one full discharge-to-hibernate cycle followed by a full charge, and the reported Wh figure will settle to the correct value.

The OS fuel gauge is jumping erratically — showing 60%, then 45%, then 70% within minutes on my P16s Gen 2. What is happening?

The fuel gauge IC in the ThinkPad P16s needs two to three calibration cycles against the new cell before it can track state-of-charge accurately. Until then, the percentage readout can swing wildly because the IC is still mapping voltage curves from the old cell's history. No hardware fault is causing this. Run two complete discharge-to-hibernate and full-recharge cycles back to back, and the gauge will stabilise.

My replacement P16s battery stops charging at 80% and will not go higher — is the cell faulty?

This is almost always the Lenovo BIOS charge threshold, not a cell fault. ThinkPad firmware includes a Conservation Mode setting that caps charging at 80% to reduce long-term cell stress during AC-connected use. Open Lenovo Vantage, go to Power → Charge Threshold, and switch from Conservation Mode to Full Charge. The cell will then charge to 100%. If Vantage is not installed, the same setting is accessible in the BIOS under Config → Power.

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