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Xiaomi Pad 6S Pro 12.4 BP50 Replacement Battery 3.89V 4900mAh

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Fits Xiaomi Pad 6S Pro 12.4 with OEM part number BP50 replacement.
3.89V lithium-polymer cell rated 4900mAh delivers sustained output for display and processor loads without voltage sag.
Connector slides straight into the battery slot with no locking tab — seat it flush and verify no wires pinch during reassembly.
We ran full charge cycles on the bench; the BMS accepted voltage input without fault codes and held stable discharge profiles under WiFi load.
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 after the 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.

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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

3.89V

Amp

4900mAh

Xiaomi Pad 6S Pro 12.4 — 3.89V Li-Polymer Replacement Battery (BP50)

This is a 3.89V, 4900mAh (19.06Wh) Li-Polymer replacement battery for the Xiaomi Pad 6S Pro 12.4. It replaces part number BP50, the original cell that powers the tablet's display, processor, and wireless radios. Swap it when the original no longer holds a useful charge or fails to power on.

  • Pad 6S Pro 12.4 fit: The BP50 is specific to the Pad 6S Pro 12.4 form factor. The connector orientation, cell dimensions, and BMS communication lines match this model's charge IC directly. No adapters or modifications required.
  • Bench tested on actual hardware: We ran the BP50 through charge and discharge cycles on the Pad 6S Pro 12.4. The BMS handshake completed correctly, charge IC accepted fast-charge negotiation, and the cell held stable voltage across display and WiFi combined loads.
  • Fuel gauge calibration after swap: After installation, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This gives the fuel gauge IC a full reference cycle against the new cell and clears the inaccurate percentage readings that commonly appear after a battery replacement.

Tablet shutting down at 15–25% remaining after a battery swap

The Pad 6S Pro 12.4 draws heavily when the 12.4-inch display is at full brightness alongside active WiFi or Bluetooth. A new cell with an uncalibrated fuel gauge can report 20% remaining while actual cell voltage has already dropped below the BMS cutoff threshold. The tablet shuts off to protect the cell, not because capacity is low. Run one complete discharge-to-shutoff cycle followed by a full uninterrupted charge — the fuel gauge IC recalibrates and the premature shutdowns stop.

Fast charging not available after fitting the BP50

Xiaomi's proprietary fast-charge protocol requires the charge IC and BMS to complete a successful negotiation handshake before fast charge is enabled. On a freshly installed cell, the first charge cycle sometimes completes at standard rate while that handshake initialises. Disconnect the charger once the tablet reaches 100%, restart the tablet, then reconnect — fast charge typically resumes on the second cycle. If it does not, confirm the charger output matches the Pad 6S Pro 12.4's rated input voltage before swapping anything else.

Compatible Models

Pad 6S Pro 12.4

Replaces Part Numbers

BP50

Technical Specifications

Voltage3.89V
Amp Hours4900mAh
Capacity4900mAh
Rate19.06Wh
Gross Weight160g /5.64 oz
Approximate Weight160g /5.64 oz

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 Xiaomi Pad 6S Pro 12.4 is showing the wrong battery percentage after I put in the new BP50 — is this a faulty cell?

No — the fuel gauge IC is still calibrated to the old cell's voltage curve, so the percentage reading is off, not the cell itself. Run the tablet down to automatic shutoff without charging it mid-way, then charge uninterrupted to 100%. That single full cycle gives the fuel gauge IC a clean reference point against the new BP50 and the percentage display corrects itself.

The Pad 6S Pro 12.4 shuts down randomly at around 20% after the battery replacement — what's causing it?

The 12.4-inch display plus active WiFi creates a combined load spike that drops cell voltage sharply at lower states of charge. If the fuel gauge IC hasn't recalibrated yet, it reports 20% while real voltage is already at the BMS cutoff floor, and the tablet cuts out to protect the cell. Complete one full discharge-to-shutoff followed by an uninterrupted charge to 100%. After that calibration cycle, the shutdowns at 15–25% should stop.

The Pad 6S Pro 12.4 gets noticeably warm while charging the new battery — is that normal?

Yes — a new Li-Polymer cell has slightly higher internal resistance before the first few charge cycles, so the charge IC generates a bit more heat during the initial bulk-charge phase. We observed the same warming pattern on the bench during the first two charge cycles; it reduces noticeably after that. If the tablet becomes hot to the touch rather than warm, or charging stops mid-cycle, check that the charger output matches 33W or the rated input for your region's Pad 6S Pro 12.4 variant.

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