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Lenovo Chromebook 100s Replacement Battery 7.6V L15M2PB2

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Fits Lenovo Chromebook 100s and Ideapad 310-14ISK; replaces OEM part L15M2PB2.
7.6V, 3800mAh lithium-polymer cell restores full charge capacity to the 100s chassis.
Connector seats flush into the internal battery slot with a single locking tab.
We ran full discharge and recharge cycles; the BMS accepted load without voltage sag.
After installation, run one full discharge to hibernation, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false health warnings that appear after every cell swap.
Extended delivery time

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

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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

7.6V

Amp

3800mAh

Lenovo Chromebook 100s / IdeaPad 310-14ISK — 7.6V Li-Polymer Replacement Battery (L15M2PB2)

This 7.6V, 3800mAh (28.88Wh) Li-Polymer cell replaces the original battery in the Lenovo Chromebook 100s and IdeaPad 310-14ISK. It matches the OEM voltage and capacity spec so Chrome OS and Windows fuel gauges read correctly after calibration. Physical dimensions are 204.05 × 86.44 × 10.24mm — same footprint as the L15M2PB2 and all cross-reference part numbers listed below.

  • Chromebook 100s and IdeaPad 310 compatibility: Both platforms share this cell because they run the same 7.6V battery bus, use an identical connector pinout, and the BMS handshake protocol matches across all L15-series part numbers including L15M2PB2, L15L2PB2, L15C2PB2, and L15C2PB6.
  • Bench tested on actual hardware: We cycled this cell on a Chromebook 100s unit and monitored BMS communication through full charge and discharge. The protection circuit held charge termination correctly at 8.7V and triggered low-voltage cutoff at 6.0V without false trips.
  • Post-install discharge cycle on Chrome OS: After fitting this battery, let the Chromebook discharge fully until it shuts itself off, then charge uninterrupted to 100% without using the device. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

Why the Chromebook 100s shuts down at 20–30% after a battery swap

The fuel gauge IC on the Chromebook 100s uses stored discharge curve data from the old cell to predict remaining capacity. A new cell has a different internal resistance profile, so the IC hits a voltage cliff earlier than the percentage shown on screen suggests. The laptop interprets the sudden voltage drop under combined CPU and display load as a critically low state and cuts power to protect the system. Running two full discharge-to-hibernate cycles recalibrates the fuel gauge IC against the actual curve of the new cell.

BIOS reporting battery health as "poor" or "replace" immediately after installation

The BIOS reads health status from EEPROM data that carries over from the old battery's wear history — it does not automatically clear when a new cell is installed. On Lenovo IdeaPad and Chromebook platforms, this warning persists until the battery learn cycle completes. Open Lenovo Vantage on Windows or use the Chrome OS battery diagnostic, then run a full charge-to-discharge cycle with the lid open and AC removed. After one complete cycle the EEPROM updates and the health warning clears.

Compatible Models

Chromebook 100s Ideapad 310 14ISK Ideapad 310-14ISK Ideapad 310-14ISK 80SL000CPH 80SL0038AX

Replaces Part Numbers

L15M2PB2 L15M2PB4 5B10K87714 B10K87722 L15L2PB2 5B10K90803 5B10K87712 L15C2PB2 5B10K90785 5B10K90784 L15L2PB3 5B10K90806 L15C2PB6 5B10L13961 5B10K87713

Technical Specifications

Voltage7.6V
Amp Hours3800mAh
Capacity3800mAh
Rate28.88Wh
Net Weight140.2g /4.95 oz
Gross Weight280.2g /9.88 oz
Approximate Weight280.2g /9.88 oz
Dimension 204.05 x 86.44 x 10.24mm

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

Chrome OS says my new battery is at 0% and won't recognise it — is the cell dead out of the box?

The fuel gauge IC on the Chromebook 100s hasn't calibrated against the new cell yet, so it reads 0% or "unknown" until it completes one full cycle. Plug in the charger and leave it connected until the LED indicator shows a full charge — do not interrupt it. Then unplug and let the device discharge fully to automatic shutdown. After that single cycle the OS fuel gauge locks onto the correct state-of-charge reading.

My IdeaPad 310-14ISK shows the new battery as 28Wh in system info but the BIOS health screen says the design capacity is different — which is correct?

The Wh figure shown in system info pulls from EEPROM data embedded in the cell, which reflects the rated chemistry spec at manufacture. The BIOS health screen compares that against a learned full-charge capacity value that is still populated with data from the old cell. They will read differently until the battery learn cycle runs at least once. Run one full uninterrupted charge to 100%, then discharge to hibernate-cutoff, and both values will align at 28.88Wh.

The replacement battery charges to 80% then stops — the charging LED goes off and nothing I do gets it past that point.

This is a BIOS-controlled charge limit, not a fault with the cell. Lenovo's firmware on the IdeaPad 310 series includes a conservation mode that caps charging at 55% or 80% depending on the threshold set. Open Lenovo Vantage on Windows, navigate to Power, then Battery, and check whether Conservation Mode or a custom charge threshold is enabled. Disable it and plug the charger back in — the battery will charge to 100%.

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