About this replacement
VeriFone Nurit 2159 — 7.2V Ni-MH Replacement Battery (BAT00031)
This is a 7.2V, 1500mAh Ni-MH replacement for the BAT00031 battery inside the VeriFone Nurit 2159 portable payment terminal. It fits the Nurit 2159 directly and matches the original voltage and capacity spec. Install it when the original cell no longer holds a charge through a full business shift.
- Nurit 2159 terminal fit: The Nurit 2159 runs a 7.2V rail with a BMS that checks cell voltage at boot. This replacement matches that rail exactly, so the terminal completes its startup handshake and enters ready state without triggering a low-voltage lockout.
- Bench tested on actual hardware: We cycled this battery through cold-start boot sequences and simulated transaction loads including receipt print pulses. The BMS held cutoff thresholds correctly and did not trip during the printer motor draw spike.
- First deployment on a live terminal: After fitting this battery, run at least one complete transaction cycle — including a receipt print — before putting the terminal into service. The Nurit 2159 maps battery capacity during normal operation and needs one full power cycle to calibrate the charge indicator accurately.
Why the Nurit 2159 reboots mid-transaction after a battery swap
The receipt printer motor draws a short high-current spike the moment it activates. On a new Ni-MH cell that hasn't been conditioned, internal resistance is slightly elevated and that spike can pull terminal voltage below the BMS cutoff threshold. The BMS interprets that dip as a fault and cuts power, which the terminal reads as a hard reset. Run two or three complete transaction-and-print cycles first — internal resistance drops as the cell conditions, and the voltage sag during printer activation becomes shallow enough that the BMS stays open.
Nurit 2159 not powering on after sitting unused in a drawer
Ni-MH cells self-discharge at roughly 1–2% per day when left idle. A terminal stored for several months can arrive with a cell voltage well below the 6.0V minimum the BMS needs to allow current flow. The BMS will block charging entirely at that point, so placing it on the dock appears to do nothing. Connect it to a known-good charger and leave it undisturbed for 30–60 minutes — most Ni-MH BMS circuits include a trickle pre-charge mode that slowly raises cell voltage back above the 6.0V recovery threshold before switching to normal charge rate.