CorDex CDX370 Thermal Camera Compatible Battery 3.7V 1800mAh

CorDex ToughPix DigiTherm — 3.7V Li-ion Replacement Battery (CDX370)

This 3.7V, 1800mAh Li-ion battery replaces the CDX370 cell in the CorDex ToughPix DigiTherm thermal imaging camera. It fits the ToughPix DigiTherm directly and restores full camera operation for field inspections. Capacity figures are sourced from product data — 1800mAh at 3.7V, totalling 6.66Wh.

• ToughPix DigiTherm compatibility: The DigiTherm runs its thermal detector array and LCD display from a single 3.7V cell. Both loads share one power rail, so the replacement cell must match the original voltage and BMS communication profile exactly — otherwise the camera rejects the pack on startup.
• Bench tested on actual hardware: We cycled this battery under simultaneous detector and display load on the DigiTherm platform. The BMS held voltage above the thermal detector's minimum threshold throughout the draw cycle and tripped protection cleanly at end-of-discharge without dropping the camera mid-frame.
• Thermal detector warm-up after swap: After fitting a fresh battery, allow the camera 60 seconds at idle before taking measurements. The microbolometer detector needs the internal board temperature to stabilise — readings taken immediately after power-on will drift until the electronics reach thermal equilibrium.

Thermal accuracy degrading before the battery indicator shows low

The DigiTherm's thermal detector is voltage-sensitive. As the cell discharges toward the mid-range, detector bias voltage drops slightly ahead of what the fuel gauge reports. This causes temperature readings to drift before the low-battery icon ever appears. The camera display and detector draw from the same cell, and the detector loses calibration accuracy first. If readings look inconsistent, check cell voltage directly — anything below 3.5V under load warrants a swap.

Camera shutting down mid-inspection with no low-battery warning

This happens when the BMS trips on a combined load spike — the thermal detector's heating element plus the display can briefly push current draw beyond what a degraded or cold cell can sustain. The BMS cuts power to protect the cell rather than warn first. It is not a camera fault. Warm the replacement battery to room temperature before fitting it in cold environments, and confirm the resting cell voltage is at or above 3.7V before starting an inspection.