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WinBook C100 14.8V Replacement Battery 442675300002 4400mAh

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From $71.99 USD $88.99
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Fits WinBook C100, C120, C140, C170 notebooks; replaces OEM part numbers 442675300002, 442675300003, 442675300005, 442675300007, 8UR18650F-SECT-QC10.
14.8V nominal voltage, 4400mAh capacity; delivers 65.12Wh total energy to sustain full CPU and display load during portable work sessions.
Connector seats flat into the battery bay slot with positive and negative terminals aligned; locking tab engages and releases with firm thumb pressure.
We bench-tested this cell in a C100 unit; the BMS accepted the new pack on first insertion with no error codes or charge gate faults.
After installation, run a full discharge to system hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false low-health warnings.
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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

14.8V

Amp

4400mAh

WinBook C100 / C120 / C140 / C170 — 14.8V Li-ion Replacement Battery (442675300002)

This is a 14.8V, 4400mAh (65.12Wh) Li-ion replacement battery for WinBook C100, C120, C140, and C170 notebook computers. It replaces OEM part numbers 442675300002, 442675300003, 442675300005, 442675300007, and 8UR18650F-SECT-QC10. Cell count, connector pinout, and BMS communication protocol match the original pack.

  • C100 / C120 / C140 / C170 compatibility: These four models share the same battery bay dimensions, 14.8V nominal rail, and SMBus BMS handshake — one pack covers all four platforms without adapter or modification.
  • Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a WinBook C100 board. The BMS negotiated correctly with the system firmware, charge current ramped as expected, and cell balancing activated without fault codes.
  • Post-install calibration on the C-series: After fitting this battery, run the laptop on battery only until it hibernates at low cutoff voltage, then charge uninterrupted to 100%. This single full cycle resets the BIOS battery learn cycle and clears the inaccurate health warning that commonly appears after swapping cells on this platform.

Why the WinBook C100 reports a new battery as poor health in BIOS

The BIOS reads health status from EEPROM data stored in the battery's onboard fuel gauge IC. When a new pack is installed, the IC ships with factory-default charge history, which the BIOS interprets as a worn cell profile. This is a data mismatch, not a hardware fault. Running one full discharge-to-hibernate then a complete charge cycle overwrites the learn data, and the BIOS health indicator updates to normal on the next boot.

WinBook C-series shutting down at 20–30% charge remaining

This shutdown pattern points to a voltage cliff — under combined CPU and display load, the cells drop below the BMS cutoff threshold before the fuel gauge reaches 0%. On a new replacement battery, it typically means the fuel gauge IC hasn't finished calibrating against the new cell chemistry. Run two to three full discharge-to-hibernate cycles, charging fully between each. After calibration, the gauge tracks accurately and the early shutdowns stop. If the fault persists beyond three cycles, check that the BIOS is not running a user-set charge limit — navigate to BIOS Power settings and confirm the charge ceiling is set to 100%.

Compatible Models

C100 C120 C140 C170 C220

Replaces Part Numbers

442675300002 442675300003 442675300005 442675300007 8UR18650F-SECT-QC10

Technical Specifications

Voltage14.8V
Amp Hours4400mAh
Capacity4400mAh
Rate65.12Wh
Gross Weight100g /3.53 oz
Approximate Weight100g /3.53 oz

Product Highlights

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

Frequently Asked Questions

WinBook C100 BIOS says battery health is 0% or unknown right after I installed a new pack — is the battery dead?

No — the BIOS is reading stale EEPROM data from the new cell's factory-default fuel gauge IC, not actual cell condition. Run the laptop on battery until it hibernates at low-voltage cutoff, then charge without interruption to 100%. That single learn cycle writes fresh data to the fuel gauge IC, and the BIOS health reading corrects itself on the next boot.

The battery percentage on my WinBook C140 jumps around wildly for the first few days — 60% one minute, 30% the next. What's going on?

The fuel gauge IC inside the new pack needs calibration cycles to map its charge model against the actual cell chemistry. Until it completes two or three full discharge-and-charge cycles, the state-of-charge estimate can swing significantly under load. Run the laptop to hibernate cutoff and back to 100% three times in a row without partial charges between cycles — the gauge stabilises and the erratic jumps stop.

System info on my WinBook C170 shows the wrong Wh rating after fitting the new battery — it doesn't match the 65.12Wh spec. Is this a fault?

The Wh value displayed in Windows or BIOS is read directly from the battery pack's EEPROM, which stores the manufacturer's rated capacity figure. Different OEM part numbers in this family (442675300002 through 442675300007) can carry slightly different EEPROM-encoded Wh values even though the actual cell capacity is the same. Cross-check by confirming the voltage reads between 14.4V and 16.8V at the battery terminals — if voltage is within that range and the pack charges normally, the EEPROM display value is a cosmetic discrepancy, not a functional fault.

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