Sofirn SP35 SST40 2000lm
21700 battery
200 meters
Good temperature control. I turn on turbo mode for 30 minutes. The flashlight mange the heat well.

Advanced Temperature Regulation (ATR) technology: As the temperature rises, SP35 is programmed to automatically step down and step up the brightness. These thresholds are set at 45°C, 55°C and 65°C. The higher the temperature gets, the more the brightness will drop. Once temperature decreases, brightness will be increased again according to your selected mode.