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Clevo B1511 14.4V Notebook Replacement Battery 6-87-N750S

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Fits Clevo B1511(44587)(N751WU) and replaces OEM part numbers 6-87-N750S-31C00, 6-87-N750S-3CF1, 6-87-N750S-3CF2, 6-87-N750S-4EB1, 6-87-N750S-4EB2, 6-87-N750S-4EB3, and N750BAT-4.
14.4V 2200mAh capacity delivers 31.68Wh — sufficient for standard office and web workflows on this notebook without extending runtime past the original cell.
Connector seats flush into the battery bay slot with vertical insertion; locking tab engages on both sides when seated fully and will not release unless both tabs are pressed simultaneously.
We bench-tested this cell against the B1511 charging circuit at 14.4V input; the BMS accepted the handshake on first insertion and held regulated discharge through a full CPU load cycle without cutoff.
After installation, discharge the notebook to sleep mode then charge uninterrupted to 100% — this run resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
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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

14.4V

Amp

2200mAh

Clevo N751WU / N770WU Series — 14.4V Li-ion Replacement Battery (6-87-N750S-31C00)

This is a 14.4V, 2200mAh (31.68Wh) Li-ion battery for Clevo notebooks based on the N751WU and N770WU platforms, including the B1511 and B1701 chassis variants. It replaces OEM part numbers under the 6-87-N750S and N750BAT-4 family. Fit models confirmed include B1511(44587), B1511(44591), B1511(44461), and B1701(44697).

  • N750-platform coverage: The B1511 and B1701 series share the same 14.4V four-cell Li-ion architecture, connector pinout, and BMS handshake protocol — which is why a single part number family covers multiple chassis codes across both models.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on N75x-class hardware. The BMS communicated correctly with the host system, and the protection circuit responded as expected to overvoltage and cutoff thresholds.
  • Post-swap calibration on Clevo notebooks: After fitting a new cell, run one full discharge to the hibernate-cutoff point, then charge uninterrupted to 100%. 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 on this platform.

Why the B1511 BIOS reports poor health immediately after a battery swap

The BIOS on Clevo N75x-based systems reads health data from EEPROM registers that were written by the original cell over its service life. A new cell arrives with fresh EEPROM values that don't match the accumulated charge history the BIOS expects. The system interprets that mismatch as a degraded or unknown battery. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the learn cycle and rewrites those registers against the new cell's actual chemistry.

Laptop shutting down at 20–30% shown on the gauge after battery replacement

This happens when the fuel gauge IC hasn't yet calibrated against the new cell's voltage curve. The gauge is still using the old cell's discharge profile, so it misreads the knee of the voltage curve and trips a premature shutdown. Under combined CPU and display load, the cell voltage drops faster than the uncalibrated gauge predicts — the system sees what looks like an imminent cutoff and shuts down. Run two to three full discharge and charge cycles; the fuel gauge IC will track the actual voltage floor, which on this cell is 12.0V at cutoff.

Compatible Models

B1511(44587)(N751WU) B1511(44591)(N751WU) B1701(44697)(N770WU) B1511(44461)(N751WU) B1701(44699)(N770WU) B1511(N751WU) B1701(N770WU) B1511(44592)(N751WU) B1701(44698)(N770WU) B1511(44593)(N751WU) B1701(44700)(8N770WU) B1511(44409)(N751WU) B1701(43842)(N770WU) N750WU N750S

Replaces Part Numbers

6-87-N750S-31C00 6-87-N750S-3CF1 6-87-N750S-3CF2 6-87-N750S-4EB1 6-87-N750S-4EB2 6-87-N750S-4EB3 N750BAT-4

Technical Specifications

Voltage14.4V
Amp Hours2200mAh
Capacity2200mAh
Rate31.68Wh
Net Weight230g /8.11 oz
Gross Weight500g /17.64 oz
Approximate Weight500g /17.64 oz
Dimension 268.60 x 39.00 x 20.50mm

Product Highlights

  • Brand: Clevo
  • 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

My Clevo B1511 is showing the battery as "0% available (plugged in, not charging)" after I fitted the new cell — what's happening?

The BIOS failed to initialise communication with the new cell's BMS on the first boot — this is an EEPROM handshake issue, not a faulty battery. Shut the laptop down fully, remove the AC adapter, hold the power button for 15 seconds to drain residual charge from the board, then reconnect AC and boot. If the gauge still reads 0%, enter the BIOS setup on boot and check the battery status screen — seeing a voltage reading above 12V there confirms the cell is good and the OS fuel gauge just needs a learn cycle.

Windows is reporting this battery as 31Wh but the Clevo power manager shows a different number — which one is correct?

The two tools read from different sources. Windows reads the Wh rating stored in the cell's EEPROM, which reflects the rated design capacity. The Clevo power manager calculates a current full-charge capacity based on recent discharge data, which will read lower until the fuel gauge IC has logged two or three complete cycles against the new cell. The EEPROM-rated figure of 31.68Wh is the correct reference spec for this battery — the power manager figure will converge toward it after calibration cycles complete.

The new battery stops charging at 80% and won't go higher — is the cell defective?

This is almost always a BIOS-controlled charge limit, not a cell fault. Many Clevo systems ship with a battery conservation mode enabled in the BIOS or the Clevo Control Center software that caps charging at 80% to reduce cycle wear. Open the Clevo Control Center (or check BIOS under Power Management), locate the charge limit or battery health mode setting, and set it to 100%. The cell itself charges correctly to 16.8V maximum — if the cap is off and it still stops at 80%, perform a full discharge to hibernate then a fresh charge cycle to reset the threshold.

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