About this replacement
VeriFone Ruby Console / CPU-5 / CPU-4 — 6V Ni-MH Replacement Battery (13931-01)
This is a 6V 1500mAh Ni-MH battery for the VeriFone Ruby Console, CPU-5, and CPU-4 payment terminals. It replaces OEM part numbers 13931-01 and 13466-01. The battery supports both active operation and short-duration backup power during outages at the point of sale.
- Ruby Console, CPU-5, and CPU-4 compatibility: These three terminals share the same 6V battery rail, physical connector, and BMS handshake protocol — the same cell pack satisfies all three. No wiring adapters or connector modifications are needed.
- Bench tested on actual hardware: We cycled this battery through full charge and discharge on the Ruby Console platform. The BMS accepted the cell without fault codes, and the charge IC reached full-charge termination correctly using delta-V detection.
- First transaction cycle after install: 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.
Payment terminal rebooting mid-transaction after battery swap
The receipt printer motor draws a short high-current spike — typically 1.5 to 2A — at the start of each print job. On a new Ni-MH cell that has not yet been fully conditioned, the internal resistance is slightly elevated. That spike can trip the BMS overcurrent threshold and cause an unexpected reboot. Run two or three full charge-discharge cycles before live deployment. After conditioning, internal resistance drops and the BMS handles print-motor surges without tripping.
Terminal won't power on after sitting unused in a drawer
Ni-MH cells self-discharge at roughly 1–2% per day. A terminal left unused for several months can drop the cell below the BMS recovery threshold — typically around 4.5V for a 6V pack — causing the terminal to appear completely dead. Connect the terminal to mains power and leave it on charge for a minimum of 12 hours before attempting to power on. If the terminal still does not respond after that initial charge, check that the supply voltage at the adapter output reads 9V DC before swapping any components.