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Huawei MatePad Pro HB27D8C8ECW-12 3.8V 7150mAh Battery

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From $39.99 USD $49.99
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Fits Huawei MatePad Pro models MRX-AL09, MRX-AL19, MRX-W09 and others; replaces OEM part HB27D8C8ECW-12.
This 3.8V 7150mAh Li-Polymer cell restores full charge capacity on the MatePad Pro tablet platform.
Connector seats flat into the battery slot with a single locking tab oriented toward the device edge.
We bench-tested this cell in a MatePad Pro motherboard; the BMS accepted the pack without fault codes on first insertion.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% — this resets the fuel gauge IC calibration against the new cell and resolves inaccurate percentage display.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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.

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⚠️ 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

3.8V

Amp

7150mAh

Huawei MatePad Pro — 3.8V Li-Polymer Replacement Battery (HB27D8C8ECW-12)

This is a 3.8V, 7150mAh Li-Polymer replacement battery for the Huawei MatePad Pro. It fits models MRX-AL09, MRX-AL19, and MRX-W09. It slots in where the original HB27D8C8ECW-12 cell sat before capacity degraded from repeated charge cycles.

  • MatePad Pro MRX series coverage: The AL09, AL19, and W09 variants share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell fits all three without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a MatePad Pro unit. The BMS accepted the cell without fault flags, charge IC ramped normally, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
  • Fuel gauge reset after installation: After fitting, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This forces the fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate percentage readings that almost always appear after a swap.

MatePad Pro shutting down at 15–25% remaining after battery swap

This happens because the fuel gauge IC is still calibrated to the old cell's voltage-to-capacity curve. When display brightness, WiFi, and active apps pull load simultaneously, voltage drops faster than the gauge expects — the BMS reads it as a critical low and cuts power prematurely. The fix is one full recalibration cycle: discharge to automatic shutdown, then a full uninterrupted charge to 100%. After that cycle the gauge maps correctly to the new cell and the early shutdowns stop.

Fast charging unavailable on MatePad Pro after battery replacement

Huawei's proprietary fast charge protocol requires a handshake between the charger and the charge IC. On first use after a swap, the system may default to standard 5V charging while it completes that negotiation cycle. Use the original Huawei SuperCharge adapter — third-party USB-PD chargers will not trigger the fast charge handshake. If fast charge still does not activate after one full charge cycle with the OEM adapter, reseat the battery connector and confirm it is fully latched before trying again.

Compatible Models

MatePad Pro MRX-AL09 MRX-AL19 MRX-W09 MRX-W19

Replaces Part Numbers

HB27D8C8ECW-12

Technical Specifications

Voltage3.8V
Amp Hours7150mAh
Capacity7150mAh
Rate27.17Wh
Net Weight107.2g /3.78 oz
Gross Weight247.2g /8.72 oz
Approximate Weight247.2g /8.72 oz
Dimension 136.62 x 126.62 x 2.50mm

Product Highlights

  • Brand: Huawei
  • 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 MatePad Pro shows 40% battery but the screen just went black and it won't turn on — what's happening?

The fuel gauge IC is calibrated to the old cell and misfires the low-voltage cutoff well above the actual empty point. Plug in the OEM charger and let it charge for at least 15 minutes before powering on — the cell still has charge, the gauge just lost track of it. After it boots, run one full discharge to automatic shutoff, then charge uninterrupted to 100% to recalibrate the gauge. Once that cycle is complete, the reported percentage will track the actual cell voltage accurately.

The battery percentage on my MatePad Pro is jumping around — drops 10% in minutes, then sits at the same number for an hour. Is the new battery faulty?

The new cell is almost certainly fine — this is fuel gauge drift. The gauge IC learned the old cell's discharge curve over hundreds of cycles, and those calibration values don't erase on swap. We see this consistently in bench testing immediately after installation. Run one complete cycle — discharge to automatic shutoff under normal use, then charge to 100% without interruption — and the percentage display will stabilise against the new cell's actual curve.

My MatePad Pro gets noticeably warm while charging after I fitted the new battery — should I be concerned?

Mild warmth during charging is normal. The charge IC is pushing current into a fresh cell with a slightly different internal resistance profile than the aged original, and the heat generated is within the thermal limits the system is built around. If the tablet is too hot to hold comfortably or charging stops and restarts repeatedly, disconnect the charger and check that the battery connector is fully seated — a partial connection raises contact resistance and generates excess heat. Under normal conditions, warmth during a fast charge session with the OEM adapter is expected and not a fault.

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