Lenovo 14w Gen 2 Compatible Battery 11.52V 4800mAh 5B11B36301
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Lenovo 14w Gen 2 Compatible Battery 11.52V 4800mAh 5B11B36301 - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Lenovo 14w Gen 2 Compatible Battery 11.52V 4800mAh 5B11B36301 - is backordered and will ship as soon as it is back in stock.
Voltage
11.52V
Amp
4800mAh
Lenovo 14w Gen 2 / 14e Chromebook Gen 2 — 11.52V Li-Polymer Replacement Battery (5B11B36301)
This 11.52V, 4800mAh (55.3Wh) Li-Polymer battery replaces the original cell in the Lenovo 14w Gen 2 and 14e Chromebook Gen 2 series, covering models including the 82N8001JIV, 82N8000QCK, and 82M1000NIX. It matches OEM part numbers 5B11B36301, L20D3PG1, L20L3PG1, L20M3PG1, L20M3PG4, and several others listed in Lenovo's service documentation. The connector, BMS handshake profile, and physical dimensions (283.40 × 99.00 × 5.20mm) match the original fitment exactly.
- 14w Gen 2 and 14e Chromebook Gen 2 platform fit: Both the 14w Gen 2 and 14e Chromebook Gen 2 share the same battery bay dimensions, 11.52V three-cell architecture, and EC communication protocol. That is why a single part number covers both lines — the BMS firmware expects the same charge profile and EEPROM data structure on either platform.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on a 14w Gen 2 unit, monitoring BMS handshake confirmation, charge acceptance rate, and cutoff voltage at the low end. The cell reached 100% charge without triggering a protection trip and held voltage within spec under sustained CPU and display load.
- Post-install BIOS learn cycle: After fitting this battery, run the laptop down to hibernate cutoff, then charge it uninterrupted to 100% before using it again. This gives the BIOS fuel gauge IC a full reference point against the new cell, clears the inaccurate health warning that appears after every cell swap, and resets the charge learn cycle so the percentage readout stays accurate.
Why the 14w Gen 2 shuts down at 20–30% after a battery swap
The fuel gauge IC retains voltage-to-capacity mapping data from the old cell. When the new cell's voltage curve differs even slightly, the IC misreads the remaining charge and triggers a low-battery shutdown well above the actual cutoff floor. This is not a fault with the replacement cell — it is a calibration mismatch. Running one complete discharge-to-hibernate cycle followed by an uninterrupted full charge forces the IC to relearn the curve against the new chemistry. After two or three full cycles, the shutdown point drops back to the correct level near 5–8% remaining.
BIOS reporting wrong Wh rating in system information after replacement
Lenovo's BIOS reads battery Wh capacity from EEPROM data stored on the battery's embedded controller, not by measuring actual cell capacity in real time. When the EEPROM-reported value differs from the physically installed cell's rated capacity, the system information panel shows an unexpected Wh figure. This does not affect charging, runtime, or safety — it is a metadata read from the old EEPROM template used during manufacturing. If the BIOS shows a figure that does not match the 55.3Wh spec, confirm the BIOS is fully updated, as some firmware revisions corrected how battery EEPROM data is displayed.
Compatible Models
Replaces Part Numbers
Technical Specifications
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 14w Gen 2 says the new battery is 0% and won't charge — is the BIOS stuck on the old cell's data?
This is an EEPROM handshake delay, not a dead cell. The EC sometimes holds the previous battery's state in memory and does not recognise the new cell until a hard reset clears it. Shut the laptop down fully, disconnect the AC adapter, hold the power button for 15 seconds, then reconnect AC and power on before inserting any charge. If the reading stays at 0% after one full charge attempt, run a BIOS battery reset from the Lenovo Vantage app or enter the BIOS and run the built-in battery diagnostic to force a re-initialisation.
The fuel gauge on my 14e Chromebook Gen 2 jumps around wildly — showing 60%, then 45%, then 70% within minutes. What causes this?
The fuel gauge IC calibrates itself against charge and discharge curves it has recorded over time. With a new cell installed, the IC has no reference data and interpolates capacity based on voltage alone, which produces erratic readings until it builds a real curve. This settles after two to three complete discharge-to-full-charge cycles. Do not interrupt those first cycles — partial charges extend the calibration period and keep the gauge inaccurate longer.
The replacement battery in my 14w Gen 2 reports a lower Wh figure in system info than the spec sheet shows — is something wrong with the cell?
Nothing is wrong with the cell. Lenovo's BIOS pulls the Wh figure from EEPROM metadata written during the battery's manufacturing process, and that figure can differ from the actual rated capacity by a few watt-hours depending on which firmware revision
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