Blue Bamboo P25 Replacement Battery 7.4V 1300mAh

Blue Bamboo P25 Series — 7.4V Li-ion Replacement Battery (P25-BM2)

This is a 7.4V, 1300mAh Li-ion replacement battery for the Blue Bamboo P25 portable payment terminal. It fits the P25, P25M, P25-MFI, and P25i models. The P25-BM2 part number matches the original battery connector, BMS profile, and physical housing dimensions of the stock cell.

• P25 series compatibility: The P25, P25M, P25-MFI, and P25i all share the same battery bay dimensions, 7.4V power rail, and BMS handshake protocol. One battery cell covers the entire lineup without modification.
• Bench tested on actual hardware: We ran this cell through a full charge cycle and monitored BMS communication with the terminal's charge IC. The protection circuit responded correctly to both charge termination and discharge cutoff events with no error flags.
• First deployment tip: After installing the battery, complete one full transaction cycle — including a receipt print — 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.

Why the P25 reboots mid-transaction after a battery swap

The P25's receipt printer draws a sharp current spike the moment it fires. On a new or recently installed cell, the BMS can interpret that spike as an overcurrent event and trip the protection circuit — cutting power mid-transaction. This is most common in the first few cycles before the BMS has logged normal load behaviour. Running two or three complete transaction cycles, including receipts, teaches the BMS what normal draw looks like and stops the false trips.

Terminal not completing PCI boot sequence on new battery

The P25 runs a PCI-compliant boot sequence that requires stable voltage through several hardware checks. A new battery that hasn't completed a full charge-to-discharge cycle may sit at a resting voltage that satisfies the hardware but causes the BMS handshake to time out partway through boot. Connect the terminal to the charger and allow it to reach 100% before powering on. One full boot-charge cycle is usually enough to establish the BMS handshake — after that, cold starts complete normally.