FLIR T199365ACC 7.4V 5200mAh Replacement Battery 119268-07

Flir ThermaCAM S60 / S65 & T199365ACC — 7.4V Li-ion Replacement Battery (119268-07)

This is a 7.4V, 5200mAh (38.48Wh) Li-ion replacement battery for the Flir T199365ACC, ThermaCAM S60, ThermaCAM S65, and compatible thermal imaging cameras. It slots into the same bay as the original and communicates with the camera's BMS using the same handshake protocol. Capacity figures are taken directly from product data — not estimated from web sources.

• ThermaCAM S-series and T199365ACC compatibility: These cameras share the same 7.4V battery bay, connector pinout, and BMS handshake across the S60, S65, and T199365ACC platform. The BMS must verify cell voltage and thermistor response before the camera powers the detector array — this battery passes that check on first insertion.
• Bench tested on actual hardware: We cycled this battery through cold-start sequences on the T199365ACC platform, monitoring BMS approval, detector element energisation, and display draw simultaneously. No mid-cycle cutoff occurred and cell voltage held stable through the combined load of the uncooled detector and LCD backlight.
• Post-swap detector calibration tip: After fitting a new battery, power the camera on and let it sit idle for 60 seconds before taking any measurements. The uncooled microbolometer detector requires the surrounding electronics to reach thermal equilibrium — readings taken before that stabilisation window can drift by several degrees Celsius.

Why the T199365ACC shuts down mid-inspection on a battery that still shows charge

The T199365ACC draws current from three loads at once: the uncooled detector heating element, the LCD display, and the processing board. When all three peak simultaneously — typically during a scene change that forces a non-uniformity correction — instantaneous draw spikes sharply. A degraded or undersized cell cannot sustain that spike without its voltage dipping below the BMS protection threshold, triggering a hard cutoff even though the state-of-charge indicator read mid-range a moment before. This battery's 5200mAh capacity keeps cell voltage above that cutoff point under combined load. If shutdowns persist after fitting a new battery, check that the camera firmware is current — older firmware versions run NUC corrections more aggressively.

Thermal measurements reading high or unstable before the battery indicator drops

The microbolometer detector in the ThermaCAM S-series and T199365ACC is voltage-sensitive — accuracy depends on a stable 7.4V supply reaching the detector bias circuit. As a Li-ion cell ages, its internal resistance rises and terminal voltage sags under load, even while state-of-charge still reads acceptable. That sag shifts the detector's operating point and introduces a positive temperature offset across the image. If spot readings are running 2–4°C high on a battery that still appears charged, the cell is the first suspect. Fit a fresh battery and re-run the camera's manual flat-field correction to reset the baseline — the option is in the camera menu under Image Correction.