The cooling case has a separate energy system that won't drain the flashlight's battery, and and you can use the button on the end to turn on the cooling shell.

Equipped with the latest TurboReady™ Technology, the NITECORE TM9K is an ultra compact tactical flashlight to emit a max output of 9,500 lumens with a built-in 5,000mAh Li-ion battery and the USB-C charging port. Wish this had a clip to ride high in my pocket - without a clip it just drops down to the bottom of my pocket. The positive direction of the battery corresponds to the head of the flashlight, and the negative direction of the battery corresponds to the tail of the flashlight. Additionally, the flashlight offers Nitecore's Strobe Ready function for fast access to the strobe mode and a power indicator built in to the power switch. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others.

To maximize the potential of this flashlight, our tech team went full technician mode and designed a custom cooling shell for it, other measures were taken such as high-capacity rechargeable Lithium-ion batteries, Aluminum OP reflector and a built-in thermal control module. While the light is on, the mode switch allows you to cycle through different brightness settings, including floodlight and spotlight settings.

Note that there are restrictions on some products, and some products cannot be shipped to UK destinations. 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 recently added TM20K brings 20,000-lumens to the party through 19 LEDs, piercing through the night sky with a beam distance of 290 meters (317 yd/951 ft). And builts in Micro USB Charge Port, can be charged with power bank, wall outlet and laptop, which is convenient for charging indoor and outdoor. For transport or carry, you can lock the TM20K, set it to daily mode for constant illumination, or set it to tactical mode for momentary illumination. The integrated advance temperature regulation (ATR) technology regulates the output of the TM20K according to the working condition and ambient environment to maintain the optimal performance. The NITECORE TM20K is the brightest of the Tiny Monster series, yet still remains a compact handheld size thanks to new technology and improved design.