About this replacement
Ingenico iSMP / iMP350 Series — 3.7V Li-ion Replacement Battery (296118442)
This 3.7V 1200mAh Li-ion battery replaces part number 296118442 in the Ingenico iSMP and iMP350 mobile payment terminals, including IMP350-USBLU03A and IMP350-USSCN01A variants. It restores power to portable POS devices used for wireless card transactions in retail and service environments. Voltage, capacity, and connector match the original Ingenico specification.
- iSMP and iMP350 platform fit: These models share the same 3.7V power rail, physical cell footprint (57.00 × 34.10 × 6.40mm), and BMS handshake protocol — one battery SKU covers the full IMP350 variant range without connector adapters or firmware conflicts.
- Bench tested on actual hardware: We cycled this battery through a full boot sequence and live transaction load on an iMP350 unit. The BMS accepted the handshake on first power-on, and the charge IC reached termination without fault flags.
- First deployment calibration: After installation, complete one full transaction cycle before deploying in a live environment. The terminal maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator correctly.
Terminal not completing PCI boot sequence after battery swap
The iSMP runs a PCI-compliant security check during every boot. If the BMS handshake has not yet been accepted by the terminal's charge controller, the device may stall or loop before reaching the payment application. This is not a battery fault — it is the terminal waiting for the cell to register above its internal voltage threshold. One full charge cycle after installation clears this state. If the terminal still stalls, confirm cell voltage at the connector reads at least 3.6V before reinserting.
Charge indicator stuck at 99% and never reaching 100%
On a new cell, the charge IC enters top-off mode once the cell approaches full capacity, trickling current at a low rate to avoid overcharge. This phase can hold the display at 99% for an extended period — it is normal behaviour, not a faulty battery or charger. The indicator will flip to 100% once the top-off current drops below the terminal's detection threshold. No action is needed; leave the terminal on charge and it will complete the cycle on its own.