Compatible with Lenovo

Lenovo ThinkPad P1 Gen 4 20Y3000KMS Replacement Battery - Replaces 5B11B79217

$53.46In stock

Why this battery

Fits Lenovo ThinkPad P1 Gen 4 and X1 Extreme Gen 5 laptops, replacing OEM part number 5B11B79217 and seven equivalent Lenovo battery part numbers.
15.48V and 5650mAh capacity restores full charge cycles on this 87.46Wh Li-Polymer pack for mobile workstation operation.
Connector slides into the internal battery slot with a single plastic locking tab; no tools required for installation or removal.
We bench tested this cell against the P1 Gen 4 charging circuit — the BMS accepted the pack on first insertion and delivered full capacity without throttling.
After installation, run one full discharge to hibernate cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.

15.48V5650mAhLi-Polymer

Fits 132 models · Replaces 7 part numbers

Ship from

Ships from Hong Kong Warehouse · Delivery in 28-45 days

$53.46Quantity 1

About this replacement

Lenovo ThinkPad P1 Gen 4 / X1 Extreme Gen 5 — 15.48V Li-Polymer Replacement Battery (5B11B79217)

This is a 15.48V, 5650mAh (87.46Wh) Li-Polymer battery for the Lenovo ThinkPad P1 Gen 4 and ThinkPad X1 Extreme Gen 5 mobile workstation series. It replaces OEM part numbers including 5B11B79217, L20D4P75, L20M4P75, and SB11B79216. The battery slots into the same bay as the original and connects to the same BMS interface on the motherboard.

ThinkPad P1 Gen 4 and X1 Extreme Gen 5 compatibility: Both platforms share the same 15.48V four-cell Li-Polymer architecture, identical connector pinout, and the same Lenovo BMS handshake protocol — which is why a single cell part covers both lines.
Bench tested on actual hardware: We cycled this cell on a ThinkPad P1 Gen 4 motherboard and confirmed the BMS authenticated correctly, charge current ramped as expected, and no fault codes were thrown in Lenovo Vantage.
Post-install calibration on ThinkPad P1 Gen 4: 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 against the new cell data and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting battery health as poor immediately after replacement

The ThinkPad BIOS stores battery health data in EEPROM on the motherboard, not on the cell itself. When a new cell goes in, the BIOS compares live readings against the degraded baseline it built for the old cell, which makes the new battery look worse than it is. Running the battery learn cycle — full discharge to hibernate cutoff, then a single uninterrupted charge to 100% — forces the BIOS to rewrite that baseline against the new cell's actual voltage curve. After one or two cycles, Lenovo Vantage and the BIOS health screen should read normal.

Laptop shuts down at 20–30% shown on the fuel gauge

This happens when the fuel gauge IC hasn't yet mapped the new cell's voltage-to-capacity curve. Under full CPU plus discrete GPU load, the cell hits a voltage cliff that the uncalibrated gauge hasn't accounted for, so the system cuts out while the display still shows charge remaining. It is not a faulty cell — it is the fuel gauge IC working from stale data. Run two to three full discharge-and-charge cycles without interruption. By the third cycle the gauge IC will have recalibrated and the reported percentage will track actual cell voltage accurately down to the low single digits.

Compatibility

Check your original model and part number before ordering.

Compatible brands

Lenovo

Fit Model

ThinkPad P1 Gen 4 20Y3000KMSThinkPad P1 Gen 4 20Y3000YRIThinkPad P1 Gen 4 20Y300ATGQThinkPad X1 Extreme Gen 5 21DE0007EQThinkPad P1 Gen 5-21DC000QIWThinkPad P1 Gen 5-21DC0010PEThinkPad P1 Gen 4 20Y30091IUThinkPad P1 Gen 4 20Y3009RMXThinkPad X1 Extreme Gen 5 21DE002EFRThinkPad X1 Extreme Gen 4-20Y50019SCThinkPad P1 Gen 4 20Y3000QIWThinkPad P1 Gen 4 20Y30013RIThinkPad X1 Extreme Gen 4-20Y5002VSPThinkPad P1 Gen 4 20Y3S08L00ThinkPad X1 Extreme Gen 5 21DE000RUEThinkPad P1 Gen 5-21DC005JGBThinkPad P1 Gen 5-21DC0014IUThinkPad X1 Extreme Gen 4-20Y5002LCXThinkPad X1 Extreme Gen 4-20Y5000BFEThinkPad P1 Gen 4 20Y30095RIThinkPad P1 Gen 4 20Y300ABZAThinkPad X1 Extreme Gen 5 21DE002NGQThinkPad P1 Gen 4 20Y30017ZAThinkPad P1 Gen 4 20Y3001KPBThinkPad P1 Gen 4 20Y4003CJPThinkPad X1 Extreme Gen 5 21DE0011TXThinkPad P1 Gen 5-21DC005PUKThinkPad P1 Gen 5 21DC000CGEThinkPad X1 Extreme Gen 4-20Y5005LHVThinkPad X1 Extreme Gen 4-20Y5006NADThinkPad P1 Gen 4 20Y3009NADThinkPad P1 Gen 4 20Y300AFPGThinkPad X1 Extreme Gen 5 21DE003DFEThinkPad X1 Extreme Gen 4-20Y5003RMHThinkPad X1 Extreme Gen 4-20Y6001PBRThinkPad P1 Gen 4 20Y30011RTThinkPad P1 Gen 4 20Y3001TMDThinkPad X1 Extreme Gen 4-20Y5003AFEThinkPad X1 Extreme Gen 5 21DE000NGEThinkPad X1 Extreme Gen 5 21DE001KCXThinkPad P1 Gen 5-21DC005VMNThinkPad P1 Gen 5 21DC000KPEThinkPad X1 Extreme Gen 4-20Y5002GEQThinkPad X1 Extreme Gen 4-20Y5005UMZThinkPad P1 Gen 5-21DD000BUKThinkPad P1 Gen 4 20Y3009WATThinkPad X1 Extreme Gen 4-20Y5003FPEThinkPad P1 Gen 4 20Y3001FUKThinkPad P1 Gen 4 20Y3006APEThinkPad X1 Extreme Gen 4-20Y50030GMThinkPad X1 Extreme Gen 5 21DE000WPBThinkPad X1 Extreme Gen 5 21DE001SRIThinkPad P1 Gen 5-21DC0016SPThinkPad P1 Gen 4 20Y300CDMHThinkPad X1 Extreme Gen 4-20Y5005BEQThinkPad X1 Extreme Gen 4-20Y50055CXThinkPad P1 Gen 4 20Y30002IXThinkPad X1 Extreme Gen 5 21DE003XMHThinkPad X1 Extreme Gen 4-20Y5006XFEThinkPad P1 Gen 4 20Y300A1CKThinkPad X1 Extreme Gen 5 21DE0033ADThinkPad X1 Extreme Gen 4-20Y50022IWThinkPad X1 Extreme Gen 4-20Y50041FEThinkPad P1 Gen 4 20Y3001PPBThinkPad P1 Gen 4 20Y3008TMBThinkPad X1 Extreme Gen 4-20Y50024GBThinkPad X1 Extreme Gen 5 21DE001FIWThinkPad X1 Extreme Gen 5 21DE0022TXThinkPad P1 Gen 5 21DC000GCKThinkPad X1 Extreme Gen 4-20Y5005KGMThinkPad X1 Extreme Gen 4-20Y5005QMLThinkPad P1 Gen 4 20Y30007IWThinkPad P1 Gen 5-21DC004JCAThinkPad P1 Gen 4 20Y300A4RAThinkPad X1 Extreme Gen 5 21DE003PPBThinkPad X1 Extreme Gen 4-20Y5001TGMThinkPad X1 Extreme Gen 4-20Y5003MFRThinkPad P1 Gen 4 20Y30022TWThinkPad P1 Gen 4 20Y3008YMDThinkPad X1 Extreme Gen 4-20Y50034MSThinkPad X1 Extreme Gen 4-20Y5002CFRThinkPad X1 Extreme Gen 5 21DE001NTXThinkPad X1 Extreme Gen 5 21DE002APEThinkPad P1 Gen 4 20Y300C9UEThinkPad X1 Extreme Gen 4-20Y50062IUThinkPad X1 Extreme Gen 4-20Y5005YPGThinkPad P1 Gen 4 20Y3000CBMThinkPad P1 Gen 4 20Y300B6FEThinkPad X1 Extreme Gen 5 21DE003VMDThinkPad P1 Gen 5-21DC0056UEThinkPad P1 Gen 4 20Y300A8RTThinkPad X1 Extreme Gen 4-20Y5001QMHThinkPad P1 Gen 4 20Y3006EPEThinkPad P1 Gen 4 20Y3009DATThinkPad X1 Extreme Gen 4-20Y5001FUEThinkPad X1 Extreme Gen 5 21DE001XSPThinkPad X1 Extreme Gen 4-20Y5005FGBThinkPad P1 Gen 4 20Y30005MBThinkPad P1 Gen 4 20Y3000UMZThinkPad P1 Gen 4 20Y4002LMHThinkPad X1 Extreme Gen 5 21DE0042GQThinkPad P1 Gen 5-21DC000WEEThinkPad P1 Gen 4 20Y300AFRTThinkPad X1 Extreme Gen 4-20Y5001XGBThinkPad X1 Extreme Gen 4-20Y5006QPEThinkPad P1 Gen 4 20Y3008WMNThinkPad P1 Gen 4 20Y3009JMLThinkPad X1 Extreme Gen 4-20Y50028HVThinkPad X1 Extreme Gen 5 21DE0027CKThinkPad P1 Gen 4 20Y3000KRKThinkPad P1 Gen 4 20Y3001ACKThinkPad P1 Gen 4 20Y300ATPEThinkPad X1 Extreme Gen 5 21DE0008UEThinkPad P1 Gen 5-21DC000QMXThinkPad P1 Gen 5-21DC0010TXThinkPad P1 Gen 4 20Y300A6UKThinkPad P1 Gen 4 20Y3009BFRThinkPad P1 Gen 4 20Y3009SADThinkPad X1 Extreme Gen 5 21DE002EPGThinkPad X1 Extreme Gen 4-20Y50019IXThinkPad P1 Gen 4 20Y3000QRTThinkPad P1 Gen 4 20Y3001EBMThinkPad P1 Gen 4 20Y4000EJPThinkPad X1 Extreme Gen 5 21DE000SGEThinkPad P1 Gen 5-21DC005JIVThinkPad P1 Gen 5-21DC0014MNThinkPad X1 Extreme Gen 4-20Y5002LMDThinkPad X1 Extreme Gen 4-20Y50009PEThinkPad P1 Gen 4 20Y3009FIXThinkPad X1 Extreme Gen 5 21DE002NPEThinkPad P1 Gen 4 20Y30018EEThinkPad P1 Gen 4 20Y3001LBM

Part Number

5B11B792175B11B792185M11E25313L20D4P75L20M4P75SB11B79215SB11B79216

Specifications

Battery typeLi-Polymer

Voltage15.48V

Capacity5650mAh

Wh87.46Wh

Dimensions324.30 x 67.10 x 11.10mm

Weight

Connector

ChemistryLi-Polymer

Shipping and safety

UN number:

Standard carrier options available

UN38.3 documentation pending

Return warning

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