Nitecore T4K Rechargeable Torch 4000 Lumen Turbo Super Bright Small Flashlight, Protective Case Included

Product Information

To access maximum lumen output (4,000 lumens), you switch the flashlight into Turbo mode. This is a limited time mode, because the battery usage starts to heat the flashlight up and it needs a break to cool down. During testing, it never got warmer than a hot cup of coffee—nothing dangerous. Given that Turbo only works for 10 seconds, I won’t be stressing the light by hitting turbo over and over again; it doesn’t really result in much, as the light gets heat-soaked, and turbo lasts for shorter and shorter periods until it lasts for less than 1 second. I’ve run High and Mid, though, as I believe these will be the most commonly used modes for longer periods of time. This is the default operation of the torch, but the TS10 runs Anduril 2, an open-source firmware for torches. Anduril is completely configurable but quite complex – I could fill an entire video covering all its options. You shouldn’t let that put you off, the default operation is pretty close to my perfect user interface anyway. But if you like fiddling, I’d highly suggest reading the manual that I’ll link to down below. If you get to grips with Anduril, you can have the same setup with every Anduril torch you own.

So while not quite hitting 4000 (on my sphere), it’s within the margin of error I expect with not having professional equipment, and realistically there’s almost no visible difference between 3736 and 4000. Nice! Like turbo mode, you can also immediately activate ultralow mode by holding down the power button with the light off. For this light, the spill, corona and hotspot is somewhat predictable due to the TIR optics. Surprisingly, the LEDs are not covered under the TIR (Total Internal Reflection) optics. With the LEDs used, the beam is suited for recognizing items in the near to mid-range distance. All of the beamshots taken below are done so with the following camera settings (ULTRA-LOW: 2.5 sec, F3.5, ISO100, 5000K WB, LOW: 1 sec, F3.5, ISO100, 5000K WB, MID: 0.5 sec, F3.5, ISO100, 5000K WB, HIGH: 1/5 sec, F3.5, ISO100, 5000K WB, and TURBO: 1/25 sec, F3.5, ISO100, 5000K WB). When I saw the size I was skeptical, but this light is awesome. On turbo it's 4k lumens and super bright. I love the button setup too, super simple. I have Olights, and Fenix lights and Weltools. This is my favorite so far...I didn't notice PWM in the various brightness levels. The distance from the start of the spill to the feet is minimal. Today I’m taking a look at the Nitecore T4K, the latest in the Nitecore keychain light series. This is the successor to the Nitecore TUP, which has always been a light of interest for me. A small light with an OLED screen? Ridiculous! The primary change is to increase the number of emitters from one to four, so this should be quite a hotrod. It’s fairly large for an AA or 14500 torch but still pretty light at 58.8g including the battery. It has a rather unusual design, partly to accommodate the magnetic charging port. But it’s well built with an aluminium body – mine comes with a nice matt grey finish. It has an IPX8 waterproof rating.

But this torch is bigger and heavier at 78.2g – starting to approach the size of compact 18650 torches like this Olight Baton 3 Pro. Olight doesn’t specify the LED used but it sits behind a TIR optic and the beam has a good mixture of throw and spill for an EDC torch. There’s a noticeable hotspot with 220 metres of throw and 12300 candela of intensity in turbo mode. It also has multi-coloured front auxiliary LEDs that can also be configured as well as everything else with its Anduril 2 firmware.

One of the big selling points of this torch are the 3 high CRI 5000K natural white Nichia 519A LEDs. In its brightest turbo mode I measured 822 lumens at turn, 808 lumens after 10 seconds, 788 lumens after 30 seconds, and 642 lumens after 5 minutes – very impressive for a small torch like this. And then 356 lumens after around 8 minutes which it held constant for the remainder of my measurements. The T4K arrived in a slightly different box than I’m used to with Nitecore lights – usually, I would be expecting a box that can be hung up on a retail wall-and-hook arrangement, but this has come in a box that’s more designed for displaying directly on a shelf.