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Sunmi P2 Pro Replacement Battery 7.6V 2400mAh QP1669

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From $306.99 USD $377.99
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Fits Sunmi P2 Pro payment terminals; replaces OEM part numbers QP1669 and ZAP1522.
7.6V 2400mAh Li-Polymer cell delivers 18.24Wh to sustain transaction processing across a full merchant shift.
Connector seats into the vertical slot on the P2 Pro mainboard with a single locking tab; orientation marked on the terminal housing.
We bench-tested this pack against the OEM P2 Pro charger; BMS accepted the handshake on first boot with no fault codes or delay.
After installation, complete one full transaction cycle before deploying in a live environment — the terminal maps battery capacity during normal operation and requires at least one complete power cycle to calibrate the charge indicator correctly.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

7.6V

Amp

2400mAh

Sunmi P2 Pro — 7.6V Li-Polymer Replacement Battery (QP1669 / ZAP1522)

This 7.6V 2400mAh Li-Polymer battery replaces the original cell in the Sunmi P2 Pro mobile payment terminal. It fits merchants running card transactions in retail, hospitality, and food service environments. Capacity is 18.24Wh — matching the original power delivery the terminal expects from its charge IC.

  • P2 Pro platform fit: The P2 Pro uses a specific connector orientation and BMS handshake tied to its charge management IC. This cell carries the QP1669 and ZAP1522 part references the terminal's firmware recognises during power-on initialisation.
  • Bench tested on actual hardware: We cycled this battery through the P2 Pro boot sequence and ran it through receipt printing and card reader draws. The BMS held stable under the combined wireless, display, and printer load without triggering an overcurrent cutoff.
  • First deployment tip: After fitting this battery, complete one full transaction cycle — card read, receipt print, and screen-on — before live use. The terminal maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator correctly.

Payment terminal rebooting mid-transaction after battery swap

When the receipt printer fires, it pulls a short but sharp current spike. On a new cell, the BMS may read that spike as an overcurrent event before it has learned the terminal's load profile. This triggers a protective cutoff, which the terminal registers as a hard reboot. Running two or three full transaction cycles — including printed receipts — allows the BMS to establish the correct overcurrent threshold for the P2 Pro's combined draw. After those cycles, the reboot behaviour stops.

P2 Pro not powering on after sitting unused in storage

Li-Polymer cells self-discharge at roughly 1–2% per month in storage. If a P2 Pro sits unused long enough, the cell voltage drops below the BMS recovery threshold — typically around 2.5V per cell — and the terminal refuses to boot to protect the cell from damage. Connect the terminal to its original charger and leave it untouched for 30–45 minutes before pressing the power button. The charge IC needs time to trickle-charge the cell back above the 3.0V recovery floor before full charging resumes.

Compatible Models

P2 Pro

Replaces Part Numbers

QP1669 ZAP1522

Technical Specifications

Voltage7.6V
Amp Hours2400mAh
Capacity2400mAh
Rate18.24Wh
Net Weight74g /2.61 oz
Gross Weight99g /3.49 oz
Approximate Weight99g /3.49 oz
Dimension 68.00 x 55.80 x 8.60mm

Product Highlights

  • Brand: Sunmi
  • 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 Sunmi P2 Pro reboots every time a receipt prints — is this the battery or the terminal?

This is a BMS trip, not a terminal fault. The printer motor pulls a brief current spike that a new battery's BMS can misread as an overcurrent event before it has profiled the P2 Pro's load. Run three or four full transaction cycles with printed receipts — the BMS calibrates to the terminal's actual draw pattern and the reboots stop. If it continues past five cycles, check that the battery connector is fully seated.

The charge indicator is stuck at 99% and won't move — what's happening?

A new Li-Polymer cell enters a top-off phase on first charge, where the charge IC holds at a trickle rate to safely bring the cell to full capacity. The terminal's gauge reads this as 99% because the final balancing current is too small to register as forward progress. Leave the terminal on charge for an additional 30–60 minutes past the point it appears stuck. After one full discharge-and-recharge cycle, the indicator will track normally.

The P2 Pro feels noticeably warm during a busy transaction period — is something wrong with the battery?

Warmth during peak use is a normal result of the P2 Pro drawing on the display, wireless radio, card reader, and printer at the same time. The Li-Polymer cell generates heat under that combined load, and the terminal's compact housing has limited thermal mass to absorb it. The BMS will trip and protect the cell if temperature exceeds safe limits, so no action is needed during normal service. If the terminal feels hot to the touch rather than warm, reduce back-to-back transaction frequency and allow a short idle period to let the cell temperature drop.

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