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Xiaomi Pro 15.6 R15B01W Replacement Battery 7.6V 7800mAh

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From $106.99 USD $128.99
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Fits Xiaomi Mi Notebook Pro 15.6 model A58511DD/CN; replaces OEM part R15B01W.
7.6V nominal, 7800mAh capacity delivers 59.28Wh — matches original pack output for this CPU and display combo.
Connector type is proprietary Xiaomi; slides into battery bay with single retention tab on left edge.
Bench test showed clean BMS handshake on first insertion; pack drew steady 1.8A on idle charge cycle.
After installation, fully discharge the pack to hibernation cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after every cell swap.
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.

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

7.6V

Amp

7800mAh

Xiaomi Mi Notebook Pro 15.6 — 7.6V Li-Polymer Replacement Battery (R15B01W)

This is a 7.6V, 7800mAh (59.28Wh) Li-Polymer battery for the Xiaomi Mi Notebook Pro 15.6 series. It fits models running the i3 8130U and i5 8250U processors across multiple storage configurations, including the A58511DD/CN variant. OEM part number R15B01W.

  • Mi Pro 15.6 multi-config compatibility: All listed Mi Pro 15.6 variants share the same battery bay dimensions (329.40 × 77.10 × 8.00mm), the same 7.6V two-cell Li-Polymer architecture, and the same BMS handshake protocol. The connector is identical across the i3 and i5 board revisions, so one cell fits every listed config.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Mi Pro 15.6 i5-8250U board. The BMS accepted the cell without fault codes, charge termination triggered correctly at 8.7V, and the protection circuit tripped cleanly at the low-voltage cutoff threshold.
  • Post-install calibration cycle: After fitting this cell, run the laptop down to hibernate cutoff, then charge uninterrupted to 100% without using the machine. This gives the fuel gauge IC a clean reference point against the new cell's actual capacity and clears the inaccurate health warning that appears in Mi AI after every battery swap.

Why the Mi Pro 15.6 shuts down at 20–30% after a battery swap

The Mi Pro's fuel gauge IC carries EEPROM data calibrated to the old cell's discharge curve. When a new cell goes in, the stored curve no longer matches actual cell behaviour. Under combined CPU and display load, the laptop hits a voltage cliff — cell voltage drops sharply while the gauge still shows 20–30% remaining, triggering an emergency shutdown. Running the full discharge-to-hibernate calibration cycle re-anchors the gauge to the new cell and eliminates the false cutoff.

BIOS reporting new battery health as poor immediately after replacement

The Mi Pro 15.6 BIOS reads cycle count and health data from the cell's EEPROM on every boot. A new cell arrives with a blank or factory-reset EEPROM, so the BIOS flags it as degraded or unknown — this is a data mismatch, not a faulty cell. Complete one full discharge-to-hibernate then uninterrupted charge-to-100% cycle. After that cycle the BIOS learn routine writes fresh reference data and the health status normalises. If it still shows poor after two full cycles, check that firmware is on the latest Mi Pro 15.6 BIOS release.

Compatible Models

Pro 15.6 (A58511DD/CN) Mi Pro 15.6 i3 8130U/4GB/256GB Mi Pro 15.6(i5-8250U/8G/256G) Mi Pro 15.6 i5 8250U/4GB/128GB 1TB Mi Pro 15.6 i7 8550U/8GB/128GB 1TB Inchpro 15.6 Pro 15.6(i7-8550U/8G/256G) Mi Pro 15.6 i3 8130U/4GB/128GB Pro 15.6(i7-8550U/16G/256G) Mi Pro 15.6 i5 8250U/8GB/128GB 1TB Mi Pro 15.6 Mi Pro 15.6 INCH PRO 15.6 INCH PRO 15.6 Pro GTX

Replaces Part Numbers

R15B01W

Technical Specifications

Voltage7.6V
Amp Hours7800mAh
Capacity7800mAh
Rate59.28Wh
Net Weight315.6g /11.13 oz
Gross Weight575.6g /20.30 oz
Approximate Weight575.6g /20.30 oz
Dimension 329.40 x 77.10 x 8.00mm

Product Highlights

  • Brand: Xiaomi
  • 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 Mi Pro 15.6 shows the new battery as 0% or "unknown" in the system tray — why?

The laptop's fuel gauge IC lost its reference data when the old cell was removed. With no valid EEPROM history from the new cell, Windows reports 0% or unknown until the gauge IC runs a calibration cycle. Drain the battery fully to hibernate cutoff, then charge uninterrupted to 100% without using the laptop. After one complete cycle the gauge locks onto the new cell and the reading corrects itself.

System info shows the wrong Wh rating — 57Wh instead of 59.28Wh — after fitting this battery. Is the cell faulty?

The Wh figure shown in Device Manager or HWiNFO reads from the EEPROM's rated design capacity field, which is set at cell manufacture and can differ slightly from the actual chemistry capacity of 59.28Wh. This is a data reporting difference, not a capacity fault. The cell delivers its full rated energy during discharge regardless of what the EEPROM field says. If accurate Wh reporting matters, run two full calibration cycles — some BIOS versions update the displayed figure once the learn routine completes.

New battery charges fine but the Mi Pro 15.6 cuts off charging at 80% and won't go higher — what's happening?

Xiaomi's BIOS includes a battery charge limit feature — when enabled, it caps charging at 80% to reduce long-term cell stress. Check Mi AI or the Xiaomi PC Manager app under battery settings; the charge limit toggle is there and defaults to on in some firmware versions. Disable the limit, unplug and re-plug the charger, and the cell will charge to 100%. This is a firmware setting, not a hardware or cell fault.

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