Newland ME31 Payment Terminal Compatible Battery 3.7V 3400mAh

Newland ME31 / SP630 — 3.7V Li-ion Replacement Battery

This is a 3.7V 3400mAh Li-ion battery for the Newland ME31 and SP630 portable payment terminals. It slots into the handheld unit used by merchants for card transactions in retail and hospitality settings. Voltage and capacity match the original cell exactly.

• ME31 and SP630 platform fit: Both terminals share the same battery bay dimensions, voltage rail, and connector pinout. The BMS communication protocol is identical across the ME31 and SP630 lines, so one cell covers both devices without modification.
• Bench tested on actual hardware: We ran this cell through boot, PCI sequence, Wi-Fi handshake, and simulated transaction load. The BMS accepted the cell without fault flags, and the charge IC reached full state of charge without interruption.
• First deployment tip for payment terminals: After fitting the battery, complete one full transaction cycle before deploying in a live environment. The ME31 maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator correctly.

Receipt printer causing voltage sag on the ME31

The ME31's thermal printer draws a short but sharp current spike each time it fires. On a degraded original battery, that spike drops the cell voltage enough to trigger the BMS undervoltage cutoff, which the terminal reads as a fault. A fresh cell at full capacity handles the transient without the voltage dropping below the BMS threshold. If the terminal cuts out only when printing receipts, the battery is the first component to replace.

Terminal stuck on boot screen after fitting a new battery

The ME31 runs a PCI security boot sequence that checks power stability before completing initialisation. If the replacement cell has self-discharged during storage, the terminal may not have enough voltage to pass the full boot check. Connect the terminal to the charger before the first power-on and let it charge for at least 15 minutes. Once the cell is above 3.6V, the boot sequence completes normally.