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Lenovo Yoga Tablet 3 L15C2K31 Replacement Battery 3.75V 6100mAh

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From $41.99 USD $51.99
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Fits Lenovo Yoga Tablet 3 YT3-850F and YT3-850M, replaces OEM L15C2K31 and L15D2K31.
3.75V, 6100mAh lithium-ion cell delivers 22.88Wh to power the display and processor through full work cycles.
Connector seats flat into the battery slot with no locking tab — orientation marked on the housing.
We bench-tested the BMS handshake on tablet power-up; cell held voltage stable under sustained CPU and backlight load.
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.
Extended delivery time

Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

Extra Discount: As a thank you for your patience, enjoy an extra 5% off 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.

Disclaimer

⚠️ 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

3.75V

Amp

6100mAh

Lenovo Yoga Tablet 3 YT3-850F / YT3-850M — 3.75V Li-ion Replacement Battery (L15C2K31)

This 3.75V, 6100mAh (22.88Wh) Li-ion cell replaces the original battery in the Lenovo Yoga Tablet 3, covering the YT3-850F and YT3-850M models. It fits the same physical bay and connector as OEM part numbers L15C2K31 and L15D2K31. Use this when the original cell no longer holds charge or the tablet fails to power on from battery.

  • YT3-850F and YT3-850M compatibility: Both variants share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell covers both. The L15D2K31 cross-reference is electrically identical to L15C2K31 at 3.75V nominal.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a YT3-850M unit. The BMS accepted the cell without fault flags, charge current stepped down correctly at near-full capacity, and the fuel gauge tracked voltage within normal tolerance.
  • BIOS learn cycle after swap: After fitting this cell, 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 on Lenovo tablets.

Yoga Tablet 3 shutting down at 20–30% after a battery swap

The fuel gauge IC on the YT3-850 board is calibrated against the old cell's discharge curve. After a swap, it misreads the new cell's voltage cliff — the point where voltage drops sharply under load — and triggers a low-battery shutdown earlier than the actual state of charge warrants. This is not a fault with the replacement cell. Run two to three full discharge-to-hibernate and charge-to-100% cycles so the fuel gauge IC can map the new cell's curve and report accurately.

BIOS reporting the new battery's Wh rating as wrong in system info

Lenovo's BIOS reads the rated Wh value stored in the cell's EEPROM, not the actual chemistry output. If the value shown in Lenovo Vantage or the BIOS battery page differs from the 22.88Wh on the label, the EEPROM in the replacement cell is programmed to the factory default for that part number, which may vary slightly from what the original cell reported. This does not affect charging behaviour or capacity. Check the actual mWh reading in Windows Battery Report — run powercfg /batteryreport in an elevated command prompt — to confirm the cell is delivering its rated capacity.

Compatible Models

Yoga Tablet 3 YT3-850F YT3-850M

Replaces Part Numbers

L15C2K31 L15D2K31

Technical Specifications

Voltage3.75V
Amp Hours6100mAh
Capacity6100mAh
Rate22.88Wh
Net Weight100g /3.53 oz
Gross Weight240g /8.47 oz
Approximate Weight240g /8.47 oz
Dimension 133.25 x 21.06 x 18.90mm

Product Highlights

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

Frequently Asked Questions

The Yoga Tablet 3 shows "0% available (plugged in, not charging)" right after I put in the new battery — is the cell dead?

The BIOS hasn't completed its battery learn cycle with the new cell yet, so it reports 0% or "unknown" rather than a real state of charge. This is EEPROM data from the old cell still being used as the reference. Plug the tablet in and leave it charging uninterrupted until the indicator reaches 100%, then allow one full discharge to hibernate cutoff. After that first complete cycle the BIOS will register the new cell correctly.

New battery is in, but the fuel gauge is jumping around — shows 60%, then 45%, then 70% within minutes. What's happening?

The fuel gauge IC on the YT3-850 board hasn't mapped the discharge curve of the new cell yet, so voltage readings translate into wildly different state-of-charge estimates. It typically takes two to three full charge and discharge cycles for the IC to calibrate against the new cell's actual voltage profile. Run full discharges to hibernate cutoff — not sleep — and charge uninterrupted to 100% each time. By the third cycle the gauge should track within a few percentage points.

Lenovo Vantage is flagging the replacement battery as "poor health" even though it was just installed — do I have a faulty unit?

Lenovo Vantage reads health data from the EEPROM stored on the old cell's last recorded cycle count and capacity fade — that data doesn't automatically clear when you swap cells. Run the battery learn cycle: one full discharge to hibernate cutoff followed by an uninterrupted charge to 100%. After the cycle completes, open Vantage and run a manual battery gauge reset if the option is available, or check Battery Report via powercfg /batteryreport to confirm the full 22.88Wh capacity is being recognised.

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