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BA793 MeiZu Pro 7 Plus Replacement Battery 3.85V 3400mAh

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From $25.99 USD $31.99
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Fits Meizu Pro 7 Plus with BA793 original battery part number replacement.
3.85V and 3400mAh capacity restores full processor and display power draw on this handset.
Connector seats flush into the factory slot with standard Li-Polymer latch orientation confirmed.
We cycled this cell on a Pro 7 Plus motherboard — BMS accepted charge without fault codes and voltage held steady under sustained load.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate against the new cell discharge curve.
Delivery time

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

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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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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.85V

Amp

3400mAh

MeiZu Pro 7 Plus / M793Q — 3.85V Li-Polymer Replacement Battery (BA793)

This is a 3400mAh 3.85V Li-Polymer cell for the MeiZu Pro 7 Plus (M793Q). It replaces the original BA793 battery when capacity has dropped after repeated charge cycles. It powers the display, processor, modem, and all onboard functions.

  • Pro 7 Plus and M793Q fitment: Both model designations refer to the same hardware platform. They share the same battery bay dimensions, the same 3.85V nominal rail, and the same BMS connector pinout. One cell covers both.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Pro 7 Plus board. The BMS handshake completed correctly, charge current stepped down at the expected 4.35V cutoff, and the fuel gauge IC accepted the new cell without throwing an error flag.
  • Fuel gauge recalibration on first cycle: After installing this battery, disable fast charging and run one complete discharge down to automatic shutdown, then charge to 100% on standard current. This gives the fuel gauge IC a clean reference discharge curve for the new cell before fast charge pushes high current into an uncalibrated state.

Sudden shutdown at 20–30% on the Pro 7 Plus after a cell swap

This happens because the fuel gauge IC is still using the discharge curve it mapped to the old, degraded cell. The new cell has a steeper voltage cliff at the low end than the worn cell did, so the phone hits the hardware undervoltage cutoff while the OS still shows charge remaining. The fix is one full unconstrained discharge-charge cycle with fast charging off. After that cycle, the coulomb counter has a fresh baseline and the reported percentage tracks actual cell voltage correctly.

USB fast charge not activating on the first cycle after replacement

On the first connection after a cell swap, the charge IC may default to trickle or standard 5V charging rather than negotiating the higher voltage profile. This is a protective handshake behaviour — the charge IC checks BMS state before committing to fast charge current. Plug in with the screen on and allow the first charge to complete fully at whatever rate the phone accepts. On the second connection, fast charge typically re-engages. If it does not, clear the battery stats in recovery and reboot to trigger a fresh BMS negotiation.

Compatible Models

Pro 7 Plus M793Q

Replaces Part Numbers

BA793

Technical Specifications

Voltage3.85V
Amp Hours3400mAh
Capacity3400mAh
Rate13.09Wh
Net Weight48g /1.69 oz
Gross Weight83g /2.93 oz
Approximate Weight83g /2.93 oz
Dimension 106.60 x 48.38 x 3.90mm

Product Highlights

  • Brand: MeiZu
  • Manufacturer: CS
  • Series: X-Longer
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My MeiZu Pro 7 Plus keeps shutting off at around 25% after I put in the new battery — what's wrong?

The fuel gauge IC is still calibrated to the old cell's discharge curve, so it loses track of actual voltage before the real cutoff. The new Li-Polymer cell drops voltage faster at the low end than a worn cell does, triggering a hardware undervoltage shutdown the OS doesn't predict. Run one full discharge to automatic shutdown with fast charging disabled, then charge back to 100%. After that cycle the coulomb counter recalibrates and the shutdowns stop.

The battery percentage on my Pro 7 Plus jumps around erratically after the replacement — sometimes 40%, then 55%, then back down.

Erratic percentage readings mean the fuel gauge IC is interpolating against a curve it built for a different cell. Until it has one complete reference cycle on the new BA793 cell, the IC guesses between data points and produces unstable readings. Turn off fast charging, let the phone discharge fully to shutdown, then charge uninterrupted to 100%. One clean cycle resets the reference map and the readings stabilise.

The Pro 7 Plus won't power on at all after the new battery sat in a drawer for a few months before I installed it.

Li-Polymer cells self-discharge in storage, and if the BA793 cell dropped below roughly 2.5V per cell the BMS entered lockout to prevent damage. The phone won't respond to the power button in this state. Connect the phone to a charger and leave it for 20–30 minutes without pressing anything — the charge IC will feed a trickle current to bring the cell above the BMS recovery threshold, after which normal charging resumes. If the charging LED doesn't appear within 40 minutes, try a different cable and confirm the source delivers at least 5V 1A.

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