About this replacement
Pax A910 — 7.4V Li-ion Replacement Battery (BF1024)
This is a 7.4V 2000mAh Li-ion replacement battery for the Pax A910 portable payment terminal. It fits directly into the A910 battery bay and connects to the same BMS communication bus as the original cell. Capacity is 2000mAh (14.8Wh), matching the OEM BF1024 specification.
- A910 platform fit: The A910 uses a dedicated battery bay with a multi-pin connector that carries both power and BMS data. This replacement uses the same connector pinout and BMS handshake protocol, so the terminal recognises the cell correctly on first boot.
- Bench tested on actual hardware: We ran the A910 through a full transaction cycle on this battery — contactless tap, chip insert, and receipt print in sequence. The BMS held without tripping on the combined printer motor and wireless draw, and the charge indicator updated correctly after one full boot-charge cycle.
- First deployment cycle: After fitting this battery, complete one full transaction — power on, process a payment, print a receipt — before putting the terminal into live service. The A910 maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator accurately.
Receipt printer causing unexpected battery drain on the A910
The A910's built-in thermal printer draws a sharp current spike when it fires — significantly higher than the standby or display draw. On a degraded original cell, this spike alone can push the BMS into overcurrent protection. This replacement cell is rated to handle that combined load without triggering a cutoff. If the terminal still drains faster than expected during heavy printing periods, check that the charging dock contacts are clean — a resistive connection at the dock limits the charge current the terminal receives between transactions.
Terminal not completing PCI boot sequence after sitting unused
If an A910 has been stored in a drawer for weeks, the original cell may have self-discharged below the BMS recovery threshold — typically around 2.5V per cell. At that voltage, the terminal's PCI boot sequence cannot complete because the BMS withholds power to protect the cell. Fitting this replacement battery immediately restores a full cell voltage and allows the boot sequence to run through. After powering on, leave the terminal on charge for a full cycle before deploying — this gives the charge IC time to exit top-off mode and report an accurate state of charge.