About this replacement
Elcom Euro-150TEi / Euro-50TEi Series — 7.4V Li-ion Replacement Battery (2ICR18650P)
This 7.4V 2600mAh Li-ion battery replaces part number 2ICR18650P in the Elcom Euro-150TEi, Euro-50TEi, and Euro-50TEi Mini cash registers. It provides backup power to keep the register alive during mains outages — protecting programmed prices, tax tables, and transaction data held in volatile RAM. Dimensions are 70.00 × 37.50 × 19.00mm.
- Euro-150TEi / Euro-50TEi / Euro-50TEi Mini compatibility: All three models share the same battery bay dimensions, connector pinout, and trickle-charge circuit — the 2ICR18650P cell format fits each without modification.
- Bench tested on actual hardware: We ran this battery through the Euro-150TEi's trickle-charge circuit and confirmed the BMS accepted the charge cycle without fault flags. Discharge held steady across simulated mains-fail events with the display and keypad active.
- First-charge protocol after installation: After fitting the battery, leave the register connected to mains power for 12 hours before testing backup operation. The Euro-150TEi charges this battery through a low-current trickle circuit — rushing to test it before the charge completes will give a false reading of its backup capacity.
Why the Euro-150TEi drops programmed prices after a power outage
Programmed prices, PLU data, and tax settings on the Euro-150TEi live in volatile RAM — not flash storage. The backup battery is the only thing keeping that RAM powered when mains drops. A depleted or missing 2ICR18650P means the RAM loses power within seconds of an outage, and the register resets to factory defaults. If prices disappear after every outage, the backup battery is the first thing to check — not the programming procedure.
Display goes blank the moment mains power fails
When mains fails, the backup battery must simultaneously power the CPU, RAM, display, and any active peripheral load. If the battery voltage sags below roughly 6.5V under that combined draw, the register's power circuit cuts the display to protect RAM continuity. A battery that reads 7.4V at rest but drops sharply under load is a cell approaching end of life. Replace the 2ICR18650P and allow a full 12-hour trickle charge before the next mains-fail test.