About this replacement
GENEKO SuperCash — 7.4V Li-ion Replacement Battery (INR18650 2S1P)
This is a 7.4V, 2600mAh Li-ion replacement battery for the GENEKO SuperCash point-of-sale terminal. It fits the backup battery bay and keeps the register operational when mains power drops. The INR18650 2S1P configuration matches the original cell arrangement and connector layout.
- SuperCash backup bay fit: The SuperCash uses a 2S1P 18650 pack to supply the backup rail. This replacement matches that voltage and cell count, so the register's trickle charger and BMS handshake with the pack as expected.
- Bench tested on actual hardware: We cycled this pack through the SuperCash's charge and discharge sequence. The BMS held cutoff correctly at both the low-voltage floor and the 8.4V charge ceiling with no thermal events.
- First-install charge procedure: After fitting this battery, leave the register running on mains power for 12 hours before testing backup. The SuperCash charges the pack through a trickle circuit — a partial charge will not sustain the terminal through a real outage.
Cash register losing programmed prices after a power outage with a new battery installed
PLU data and price tables on the SuperCash are held in volatile RAM. That RAM depends on the backup battery to retain its contents the moment mains power drops. If the new battery was not fully charged through the register's trickle charger before the outage, the voltage sags below the RAM retention threshold within seconds. The fix is straightforward — run the terminal on mains for at least 12 hours after fitting the new pack before exposing it to a real or simulated power loss.
Display going blank when mains power fails even with the backup battery fitted
The SuperCash display and printer draw separate load rails during a power event. A partially discharged or degraded pack can hold enough voltage to pass the BMS check during normal operation but sag immediately when the display and any pending print job pull current simultaneously. Check the pack voltage at the terminal contacts — it should read between 7.2V and 8.4V under no load. If it reads below 7.0V, the pack has not completed its trickle charge cycle or has a depleted cell; return it to a full 12-hour mains charge before retesting.