Flir Scout 240 PS24 Replacement Battery 3.7V 3600mAh

Flir Scout 240 — 3.7V Li-Polymer Replacement Battery (PS24)

This is a 3.7V 3600mAh lithium-polymer battery for the Flir Scout 240 handheld thermal imaging camera. It replaces OEM part PS24. The Scout 240 is used for building inspections, electrical diagnostics, and search-and-rescue — fields where a dead battery mid-session causes real problems.

• Scout 240 fitment: The Scout 240 runs a combined load — the infrared detector array, the display backlight, and the internal heating element all draw from the same cell. This battery matches the original 3.7V voltage rail and physical form factor to maintain that multi-load balance without tripping the BMS.
• Bench tested on actual hardware: We ran this battery under simultaneous detector and display load. The BMS held the output voltage steady through thermal cycling and responded correctly to overcurrent events without nuisance cutoffs.
• Detector warm-up discipline: After powering on the Scout 240, allow 60 seconds before taking any readings. The infrared detector needs the internal electronics to reach a stable operating temperature for accurate baseline calibration — skipping this step produces measurement drift, not a battery fault.

Why the Scout 240 shuts down mid-inspection on a new battery

The Scout 240 draws peak current when the detector heating element cycles on while the display is active — this combined spike can exceed what a degraded or cold cell will deliver. If the BMS sees the cell voltage dip below its protection threshold during that spike, it cuts power to the camera entirely. A new cell with adequate capacity handles the surge without voltage collapse. If shutdowns persist, check that the battery contacts inside the camera are clean and making full contact — a resistive connection amplifies voltage sag under load.

Thermal image accuracy degrading before the battery indicator shows low

The Scout 240's infrared detector is voltage-sensitive — as cell voltage sags under sustained load, the detector's operating point shifts before the battery gauge registers a low-charge warning. This shows up as drift in temperature readings or a softening of the thermal image contrast, not an obvious fault. The battery indicator reads state of charge, not instantaneous voltage under load, so there is a gap between what the gauge shows and what the detector actually receives. If readings become inconsistent during a session, check the cell voltage at rest — it should be above 3.5V.