I have been using the flashlight for a month and already one of the buttons that is responsible for maximum power has broken. Then moving outdoors with the same modes (around the 2,000 Lumen level), and then with the same exposure, the Turbo output. Nothing happens when you press any button; I find this very practical solution to avoid accidental starts. It is impractical and misleading to show "High brightness runtime" and saying it was shining for 200 min. Modes are selected using the toggle switch and Strobe Ready technology allows for instant access to strobe from any state.

To enter the lockout mode again slide the toggle along to the lockout icon and leave it there for at least two seconds to activate lockout. The brightness levels are operated by a metal power button on the tail end and a mode button on the side of the tail end. The body of the TM20K is a single piece, and this is not broken by any battery doors, as the TM20K has a built-in battery and is USB-C rechargeable. The TM20K has a deep reflector in the center for the launch, while laterally, around, we find 18 LEDs for the totally flood beam. On the bottom side is the user mode selection switch and on the opposite side the mode button that we will use to change the available brightness levels.In addition, the side is also enhanced with a button for the light modes and a switch that determines which mode the TM20K is using. The mode switch is used to cycle through brightness settings while the light is on including the dedicated floodlight mode, or spotlight mode. The beam it emits in addition to being remarkable in TURBO also has an opening angle of almost 180 °, really impressive.

Even in the flashlight world brands and manufacturers do not sit idly by but still continue to develop their products. There’s no threads to get to or any insides to take a peek at but I trust that Nitecore have done a good job. In addition to nature and meteorology Koen loves to show others what a light can do and what its beam looks like at night.The high brightness level run-time is measured without temperature regulation active, therefore as the TM20K regulates its outputs and adapts to the ambient environment to maintain optimal performance, this may affect the real use run-times. In mode 2 press and hold the power button for momentary illumination in the previously used brightness setting, and change the brightness level by pressing the mode button to cycle through ultralow, low, mid, high while still holding the power button.