VeriFone Nurit 8040 Replacement Battery 7.4V 2200mAh

VeriFone Nurit 8040 / 8400 Series — 7.4V Li-ion Replacement Battery (84BTWW01D021008006114)

This 7.4V, 2200mAh Li-ion battery replaces the original pack in the VeriFone Nurit 8040 and Nurit 8400 payment terminals, including the PCI Compliant variant. It matches the OEM voltage rail, physical dimensions (75.40 × 50.30 × 21.70mm), and connector spec needed for the terminal to boot and hold a charge during field operation.

• Nurit 8040 / 8400 / 8400 PCI platform: All three models share the same battery bay geometry, 7.4V supply requirement, and BMS handshake protocol. One cell fits all three without modification.
• Bench tested on actual hardware: We cycled this battery through a full boot sequence on a Nurit 8400 unit. The BMS accepted the cell without fault codes, the charge IC entered top-off mode at 8.35V, and the terminal completed PCI POST without interruption.
• First-deployment calibration: After fitting this battery, run at least one complete transaction cycle — print a receipt, process a card — before putting the terminal on a live counter. The terminal maps battery capacity during normal operation and needs that activity to calibrate the charge indicator correctly.

Receipt printer causing mid-transaction battery drain on the Nurit 8040

The Nurit 8040's thermal printer motor draws a short but sharp current spike when it fires — often 1.5A to 2A above idle draw. On a degraded original battery, that spike pushes the cell voltage below the BMS low-voltage trip threshold, and the terminal cuts power mid-transaction. A fresh 2200mAh cell with lower internal resistance handles that spike without the voltage sag that triggers the trip. If reboots are happening specifically at the point a receipt prints, the battery is the first thing to rule out.

Terminal not completing PCI boot sequence after battery swap

The Nurit 8400 PCI Compliant model runs a security POST at startup that draws sustained current while validating tamper-detection hardware. If the battery was just installed and the cell hasn't gone through a full charge cycle, the charge IC may still be in pre-charge conditioning mode and can't sustain that load cleanly. The terminal stalls or loops at the boot screen. Fix: charge the battery fully until the charge LED goes green, then power the terminal on. Once the cell reaches 8.35V resting voltage, the boot sequence completes normally.