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Clevo N551RC 11.4V Replacement Battery 6-87-N550S-4E41

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From $98.99 USD $121.99
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Fits Clevo N551RC, N551RN, N550RN notebooks; replaces OEM part 6-87-N550S-4E41, 6-87-N550S-4E43, 6-87-N550S-4E4, N550BAT-3, 6-87-N550S-4E42.
11.4V, 4000mAh lithium-polymer cell delivers 45.6Wh; matches original output for full CPU and display load cycles.
Connector slots vertically into the battery bay; locking tab seats flush against the right edge of the compartment.
We bench-tested this cell on a cold boot draw; BMS accepted the new pack without fault codes after first insertion.
After installing, discharge fully to hibernate-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
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.

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

11.4V

Amp

4000mAh

Clevo N551RC / N550RN Series — 11.4V Li-Polymer Replacement Battery (6-87-N550S-4E41)

This is an 11.4V, 4000mAh (45.6Wh) lithium-polymer battery for the Clevo N551RC, N551RN, and N550RN notebooks. It replaces OEM part numbers 6-87-N550S-4E41, 6-87-N550S-4E43, 6-87-N550S-4E4, N550BAT-3, and 6-87-N550S-4E42. Physical dimensions are 250.40 × 85.70 × 8.20mm — confirm these against your existing cell before fitting.

  • N551RC, N551RN, and N550RN compatibility: These three models share the same battery bay dimensions, connector pinout, and BMS communication protocol. The same cell fits all three without modification. Check the sticker on your original battery for any of the part numbers listed above to confirm you have the right variant.
  • Bench tested on actual hardware: We ran this cell through charge-to-full, discharge-to-cutoff, and back-to-full cycles on the N551RC platform. The BMS handshake completed correctly, charge termination triggered at the expected voltage, and the protection circuit responded to over-discharge conditions without fault.
  • Post-installation conditioning for this platform: After fitting, run one full discharge until the system hibernates at low battery, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that commonly appears after a cell swap on this series.

Why the N551RC shuts down at 20–30% battery remaining

The fuel gauge IC on this platform was calibrated against the original cell's discharge curve. When a new cell is installed, the IC's stored data no longer matches the actual chemistry, so it miscalculates the remaining capacity. Under full CPU and display load, the laptop hits a voltage point the IC interprets as critical cutoff — even though the cell has charge left. Running two to three full discharge-and-charge cycles recalibrates the IC against the new cell and brings the gauge back into accurate range.

BIOS reporting battery health as "poor" immediately after replacement

The BIOS reads battery health data from EEPROM registers on the battery's BMS board. A fresh replacement cell carries factory-default EEPROM values that don't yet reflect real-world cycle data, and some BIOS firmware versions flag this as a health warning rather than a new-cell state. This is not a fault with the cell. Complete the learn cycle — discharge fully to hibernate, charge uninterrupted to 100% — and the BIOS health status will update once the EEPROM data populates correctly. If the warning persists beyond three cycles, check BIOS version against Clevo's firmware release notes for your model.

Compatible Models

N551RC N551RN N550RN

Replaces Part Numbers

6-87-N550S-4E41 6-87-N550S-4E43 6-87-N550S-4E4 N550BAT-3 6-87-N550S-4E42

Technical Specifications

Voltage11.4V
Amp Hours4000mAh
Capacity4000mAh
Rate45.6Wh
Net Weight241g /8.50 oz
Gross Weight501g /17.67 oz
Approximate Weight501g /17.67 oz
Dimension 250.40 x 85.70 x 8.20mm

Product Highlights

  • Brand: Clevo
  • 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 N551RC shows a different Wh rating in system info than the battery label — is the cell wrong?

The Wh figure displayed in Windows or Linux power settings is pulled from the EEPROM on the battery's BMS board, not the physical label. Factory EEPROM values on replacement cells can differ slightly from the printed spec until the fuel gauge IC has run calibration cycles against the new chemistry. The label and product data are the authoritative values: 45.6Wh at 11.4V. Run two full discharge-to-hibernate and charge-to-100% cycles — the reported figure will stabilise.

The laptop won't charge past 80% after fitting the new cell — is this a faulty battery?

This is almost always a BIOS-controlled charge limit, not a cell fault. Clevo and many OEM BIOS versions include a battery conservation mode that caps charging at 80% to reduce long-term cell stress. Check the Clevo Control Center or BIOS power settings for a "Battery Care" or "Charging Mode" option and set it to full-charge mode. If no such setting exists, confirm your BIOS is on the latest firmware — some early versions had a bug that locked the charge ceiling regardless of software setting.

Windows shows the battery as "Unknown" or 0% for several minutes after boot — what's happening?

The fuel gauge IC needs a moment to establish communication with the new cell's BMS and read the EEPROM data on first boot. If "Unknown" or 0% persists beyond two or three minutes, the IC hasn't completed initialisation — this usually clears after the first full discharge cycle. If the status stays stuck at 0% with the charger disconnected and the laptop still running, boot into BIOS setup, let it sit on that screen for 60 seconds, then exit — this forces a BMS re-initialisation outside the OS power stack.

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