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Lenovo IdeaPad Flex 3 11IGL05 Replacement Battery L19C3PF8 11.52V

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From $64.99 USD $79.99
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Fits Lenovo IdeaPad Flex 3 11IGL05 and replaces L19C3PF8, L19M3PF8, SB10X02592, SB10X02595, 5B10X02593, 5B10X02604.
11.52V, 3150mAh Li-Polymer cell delivers 36.29Wh to restore full operating time on this convertible ultrabook.
Connector solders directly to the mainboard slot; no proprietary clips or locking tabs; orientation marked on housing.
We ran full discharge and recharge cycles; the BMS reported nominal voltage under 3A draw with no early cutoff.
After installation, discharge the cell completely to hibernation then charge uninterrupted to 100% to reset the BIOS battery learn cycle.
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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.52V

Amp

3150mAh

Lenovo IdeaPad Flex 3 11IGL05 — 11.52V Li-Polymer Replacement Battery (L19C3PF8)

This is an 11.52V, 3150mAh (36.29Wh) Li-Polymer battery for the Lenovo IdeaPad Flex 3 11IGL05 series. It fits the 11-inch 2-in-1 convertible chassis and connects using the original three-cell BMS handshake. OEM part numbers L19C3PF8, L19M3PF8, SB10X02592, SB10X02595, 5B10X02593, and 5B10X02604 all cross to this cell.

  • Flex 3 11IGL05 series fit: Every variant in this series — from the 82B20024IV to the 82B2001MUK and 119 additional sub-models — shares the same connector pinout, BMS communication protocol, and 11.52V three-cell rail. One cell covers the full range.
  • Bench tested on actual hardware: We ran this cell in an 11IGL05 chassis and confirmed the BMS authenticated without fault codes. The charge controller accepted the cell and climbed to full capacity without triggering a protection cutoff.
  • Post-install calibration on the Flex 3: After fitting, run the laptop down to hibernate cutoff under normal load — screen on, browser active — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after a cell swap.

BIOS reporting poor battery health immediately after replacement

The Flex 3 BIOS reads health data from EEPROM values stored on the previous cell. When a new cell is installed, the BIOS compares live readings against the old cell's stored profile and flags a mismatch as poor health. This is a data conflict, not a fault with the new battery. Run one complete discharge-to-hibernate followed by an uninterrupted charge to 100%. That single learn cycle overwrites the stale EEPROM baseline and clears the warning.

Laptop shuts down at 20–30% remaining after battery swap

This happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve. The IC still maps percentages against the old cell's discharge profile, so it calls 20–30% as the cutoff point when the new cell still has usable capacity. Under full CPU and display load, the voltage sag accelerates the miscalculation. Two to three full discharge-and-charge cycles recalibrate the IC — after that, the gauge tracks accurately and shutdowns stop well above 15V.

Compatible Models

IdeaPad Flex 3 11IGL05 IdeaPad Flex 3 11IGL05 82B20024IV IdeaPad Flex 3 11IGL05 82B2001MUK IdeaPad Flex 3 11IGL05 82B20014AD Flex 3-11IGL05 82B2000XAU IdeaPad Flex 3 11IGL05 82B2000SPG IdeaPad Flex 3 11IGL05 82B20047GE IdeaPad Flex 3 11IGL05 82B2003PMJ IdeaPad Flex 3 11IGL05 82B2002YSB IdeaPad Flex 3 11IGL05 82B2001UTW IdeaPad Flex 3 11IGL05 82B2001CFR IdeaPad Flex 3 11IGL05 82B20005US IdeaPad Flex 3 11IGL05 82B2000FTX IdeaPad Flex 3 11IGL05 82B2003WUK IdeaPad Flex 3 11IGL05 82B20037AX IdeaPad Flex 3 11IGL05 82B2002FTW IdeaPad Flex 3 11IGL05 82B20022IV IdeaPad Flex 3 11IGL05 82B2001KAU IdeaPad Flex 3 11IGL05 82B20012GE Flex 3-11IGL05 82B2001KAU IdeaPad Flex 3 11IGL05 82B2000PTA IdeaPad Flex 3 11IGL05 82B20045AU IdeaPad Flex 3 11IGL05 82B2003LUS IdeaPad Flex 3 11IGL05 82B2002WHV IdeaPad Flex 3 11IGL05 82B2001SPH IdeaPad Flex 3 11IGL05 82B2001ACF IdeaPad Flex 3 11IGL05 82B20009AX IdeaPad Flex 3 11IGL05 82B2004FMH IdeaPad Flex 3 11IGL05 82B2003UUK IdeaPad Flex 3 11IGL05 82B20034PH IdeaPad Flex 3 11IGL05 82B2002DID IdeaPad Flex 3 11IGL05 82B20020IV IdeaPad Flex 3 11IGL05 82B2001HFR IdeaPad Flex 3 11IGL05 82B2000XAU IdeaPad Flex 3-11ADA05(82G4) IdeaPad Flex 3 11IGL05 82B2000MHH IdeaPad Flex 3 11IGL05 82B20042MJ IdeaPad Flex 3 11IGL05 82B2003DAU IdeaPad Flex 3 11IGL05 82B2002TMZ IdeaPad Flex 3 11IGL05 82B2001QGE IdeaPad Flex 3 11IGL05 82B20017AD Flex 3-11IGL05(82B20000UK) IdeaPad Flex 3 11IGL05 82B2000BAX IdeaPad Flex 3 11IGL05 82B2004AUE IdeaPad Flex 3 11IGL05 82B2003SMJ IdeaPad Flex 3 11IGL05 82B20032RM IdeaPad Flex 3 11IGL05 82B20027TW IdeaPad Flex 3 11IGL05 82B2001XIV IdeaPad Flex 3 11IGL05 82B2001FFR IdeaPad Flex 3-11ADA05(82G4000VGE) IdeaPad Flex 3 11IGL05 82B2000KTW IdeaPad Flex 3 11IGL05 82B20040BM IdeaPad Flex 3 11IGL05 82B2003BMB IdeaPad Flex 3 11IGL05 82B2002RAD IdeaPad Flex 3 11IGL05 82B2001NUK IdeaPad Flex 3 11IGL05 82B20015AD Flex 3-11IGL05(82B20003US) IdeaPad Flex 3 11IGL05 82B2000DID IdeaPad Flex 3 11IGL05 82B20048CK IdeaPad Flex 3 11IGL05 82B2003QPH IdeaPad Flex 3 11IGL05 82B20030MH IdeaPad Flex 3 11IGL05 82B20025IV IdeaPad Flex 3 11IGL05 82B2001VAX IdeaPad Flex 3 11IGL05 82B2001DFR IdeaPad Flex 3 11IGL05 82B20003US IdeaPad Flex 3 11IGL05 82B2000GTX IdeaPad Flex 3 11IGL05 82B2003XUK IdeaPad Flex 3 11IGL05 82B20038AD IdeaPad Flex 3 11IGL05 82B2002GTW IdeaPad Flex 3 11IGL05 82B20023IV IdeaPad Flex 3 11IGL05 82B2001LUK IdeaPad Flex 3 11IGL05 82B20013AD Flex 3-11IGL05 82B2000YAU IdeaPad Flex 3 11IGL05 82B2000RPG IdeaPad Flex 3 11IGL05 82B20046AU IdeaPad Flex 3 11IGL05 82B2003NSB IdeaPad Flex 3 11IGL05 82B2002XHV IdeaPad Flex 3 11IGL05 82B2001TGE IdeaPad Flex 3 11IGL05 82B2001BFR IdeaPad Flex 3 11IGL05 82B20008TW IdeaPad Flex 3 11IGL05 82B2000ETX IdeaPad Flex 3 11IGL05 82B2003VUK IdeaPad Flex 3 11IGL05 82B20036AX IdeaPad Flex 3 11IGL05 82B2002ESA IdeaPad Flex 3 11IGL05 82B20021IV IdeaPad Flex 3 11IGL05 82B2001JFR IdeaPad Flex 3 11IGL05 82B2000YAU Flex 3-11IGL05 82B20046AU IdeaPad Flex 3 11IGL05 82B2000NID IdeaPad Flex 3 11IGL05 82B20044SA IdeaPad Flex 3 11IGL05 82B2003ESB IdeaPad Flex 3 11IGL05 82B2002VHV IdeaPad Flex 3 11IGL05 82B2001RGE IdeaPad Flex 3 11IGL05 82B20018US Flex 3-11IGL05(82B2) IdeaPad Flex 3 11IGL05 82B2000AAX IdeaPad Flex 3 11IGL05 82B2004EGE IdeaPad Flex 3 11IGL05 82B2003TUK IdeaPad Flex 3 11IGL05 82B20033PH IdeaPad Flex 3 11IGL05 82B20029SA IdeaPad Flex 3 11IGL05 82B2001YIV IdeaPad Flex 3 11IGL05 82B2001GFR IdeaPad Flex 3 11IGL05 82B2000VMX IdeaPad Flex 3-11ADA05(82G40018GE) IdeaPad Flex 3 11IGL05 82B2000LMJ IdeaPad Flex 3 11IGL05 82B20041BM IdeaPad Flex 3 11IGL05 82B2003CAX IdeaPad Flex 3 11IGL05 82B2002SAD IdeaPad Flex 3 11IGL05 82B2001PUK IdeaPad Flex 3 11IGL05 82B20016PH Flex 3-11IGL05(82B20001UK) IdeaPad Flex 3 11IGL05 82B2000CID IdeaPad Flex 3 11IGL05 82B20049GE IdeaPad Flex 3 11IGL05 82B2003RMZ IdeaPad Flex 3 11IGL05 82B20031GE IdeaPad Flex 3 11IGL05 82B20026IV IdeaPad Flex 3 11IGL05 82B2001WIV IdeaPad Flex 3 11IGL05 82B2001EFR IdeaPad Flex 3 11IGL05 82B20002US IdeaPad Flex 3 11IGL05 82B2000HSB IdeaPad Flex 3 11IGL05 82B2003YUK IdeaPad Flex 3 11IGL05 82B20039MZ IdeaPad Flex 3 11IGL05 82B2002HSA

Replaces Part Numbers

L19C3PF8 L19M3PF8 SB10X02592 SB10X02595 5B10X02593 5B10X02604

Technical Specifications

Voltage11.52V
Amp Hours3150mAh
Capacity3150mAh
Rate36.29Wh
Net Weight151g /5.33 oz
Gross Weight291g /10.26 oz
Approximate Weight291g /10.26 oz
Dimension 242.00 x 101.60 x 4.50mm

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 Lenovo Flex 3 shows a new battery at 0% and won't detect it at all — is the cell dead?

Not likely. The Flex 3 BIOS holds EEPROM data from the old cell, and until it runs a learn cycle it can report 0% or "unknown" for the replacement. Connect the charger and let the cell charge uninterrupted to 100%, then run it down to hibernate cutoff once. That single cycle gives the BIOS enough data to read the new cell correctly. If it still shows 0% after a full charge, reseat the battery connector and check for a bent pin on the three-cell harness.

Windows shows this battery as 36Wh but Lenovo Vantage shows a different Wh rating — which is right?

The Wh figure in Lenovo Vantage reads from the EEPROM on the cell itself, which stores the rated capacity from the manufacturing profile. The 36.29Wh value in Windows reflects live chemistry measurements. A small difference between the two is normal — the EEPROM value is set at the factory and doesn't update as the cell cycles. If Vantage shows something significantly lower than 36Wh, run the battery learn cycle first; a fresh calibration cycle often brings both readings into alignment.

The Flex 3 stops charging at 80% after I swapped the battery — is the replacement faulty?

The cell is not faulty. Lenovo's BIOS includes a firmware-controlled charge limit that caps charging at 80% when "Battery Conservation Mode" is active in Lenovo Vantage or the BIOS power settings. This setting persists through a battery swap. Open Lenovo Vantage, go to Power, find Battery Charge Threshold or Conservation Mode, and switch it off. The battery will then charge to 100%.

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