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

Product Information

The Nitecore T4K can be turned on and work while charging or remain always on using a USB device such as a power bank (Turbo excluded). And an arguably more useful torch for day to day jobs around the house, working on the car and DIY tasks – especially in the winter months is a head torch. I also use one for running sometimes three times a week at the moment with these short days. I’ve already started collecting the best options I can find for another roundup – that video and article should be out soon! The clip has sufficient tension to ensure that the light will stay clipped to any material to prevent the light from falling out.

Note: By being in DEMO mode and reactivating the flashlight within 3 seconds after turning it off, you will have temporary access to DAILY mode until you turn off the flashlight again. The Acebeam E70 Mini is a well built torch with a high CRI natural white floody beam, well regulated outputs up to around 500 lumens and a good well thought out user interface. It’s not the cheapest or most compact 18650 torch around, but it’s worth the asking price. Honourable mentions Olight Baton 3 Pro – far left You can’t use third party batteries in the Warrior Mini 2 but I was able to charge the battery in my external charger, although it’s not recommended since the positive and negative terminals of the battery are next to each other, separated by a thin insulator. If you’re not careful you might short the battery. I also have the SC21 Pro from Sofirn which is very similar but almost half the size and weight, running off a 16340 battery. And it has the option of a higher CRI, warmer LED which I do slightly prefer. The OLED display is a fantastic feature because you’ll never be left wondering how much time is left before the battery dies. For each brightness level, the display shows a real-time countdown of the minutes left on that level. Brightness modes and max runtimeshttps://www.nitecorestore.com/Nitecore-T4K-4000-Lumen-Keychain-EDC-Flashlight-p/fl-nite-t4k.htm(link is external) Four thousand lumens in a flashlight this small is pretty insane. I already own several EDC flashlights, including Maratac AAs and AAAs, ReyLight Pineapples, an Olight i3T and Olight i5T, and even a 2800-lumen Anduril-powered Lumintop FW3T. The latter of which was my brightest EDC flashlight—until the T4K came along. The torch head got warm to the touch at around 46°C. The moonlight mode I measured at 2 lumens which is a bit bright for a moonlight mode but not too bad. This could be the gadget lover’s perfect torch. It’s pretty small and lightweight, has an insane amount of brightness, and the OLED screen makes it a joy to use. But it’s quite pricey, it has a non replaceable battery, the turbo mode is very brief, and the lower modes although well regulated are less than you get on some much smaller true keyring torches. Holding down the switch with the torch off accesses low mode with 2 sub-modes. Press and hold the switch to cycle between them. Low mode 1 is 1.5 lumens for 100 hours and low mode 2 is about the dimmest moonlight mode I’ve seen – 0.2 lumens that can last for up to 50 days!

It also has multi-coloured front auxiliary LEDs that can also be configured as well as everything else with its Anduril 2 firmware. This torch has a Luminus SST40 LED and the manual simply lists runtimes as “the lower the brightness the longer the runtime, with a range from 1 lumen to 2000 lumens” This is one issue I have with a lot of Anduril torches. You often don’t know the exact runtime of any particular mode – and with the default smooth ramped brightness it’s very easy to have a higher brightness than you need, with very short runtimes as a consequence. And to complicate matters further it’s possible to manually configure temperature step down with Anduril firmware – which will alter brightness levels and runtimes considerably. I also tested the Thrunite T2 which runs off the larger 21700 battery but is still very compact. Thrunite quote a 3757 lumen output although I measured a fair bit lower at just under 3000 lumens, still very powerful for its size. Turbo output from Thrunite T2The Wurkkos TS10 comes in a plain box with a lanyard, spare o-rings and a user manual. This is an AA style torch but will only take 3.6V Li-ion 14500s – it needs at least 3V and won’t work with standard 1.5V AA Alkaline or NiMH batteries unfortunately. Like many high-powered lights, accessing the Turbo mode will cause the T4K to heat up rapidly, so the use of this mode is limited. In addition, while engaged, you must hold the mode button, meaning you can’t just turn on Turbo mode and walk away. The box opens by lifting a flap that attaches magnetically to the rest of the box, revealing the items within: 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 measured 1778 lumens at turn on, 1765 after 10 seconds and 1727 lumens after 30 seconds. Almost exactly the spec’d 1750 lumens. It held over 1000 lumens for a couple of minutes before dropping to around 466 lumens after 4 minutes which is maintained for the remainder of my tests. And again pretty much as spec’d. In DAILY mode, the flashlight will remain on until the user turns it off manually. The "TURBO" level is only momentary by holding down the "MODE" button. Under the logo on the front of the light is a naked USB-C port used for charging. One thing to point out here is the fact that there isn't a cover over this port. That's a bit concerning due to the potential for water penetration.Two user modes are available. Demo Mode for every day carry and short time illumination, and Daily Mode for long time activation. Advanced temperature regulation adjusts the brightness according to the working temperature to maintain optimal performance and to prevent overheating. Fenix are well known for their well regulated constant outputs and the E18R V2.0 is no exception – all the modes up to high were pretty much spot and with a constant output. I measured turbo at 1279 lumens at turn on, 1230 at 10 seconds, 1182 at 30 seconds, 563 at 5 minutes and 415 lumens at 10 minutes.

There’s also the enthusiast’s favourite the Emisar D4V2 which you can configure however you like – front LEDs, switch LED, body colour etc. Turbo output from Emisar D4V2 (3 x domed Nichia 519A 4500K emitters 3800 lm) I’d really like to see a 1 hour 400-500 lumen high mode to make it a more versatile torch that I might grab for my morning walk. In some ways it is best suited as a keyring torch, if you’re ok with the bulk, and it’ll certainly impress your friends! Sofirn SC31 Pro Here to stay is the simple dual button design with a power button for on and off, and a mode button to cycle through brightness settings. The mode button also doubles as a turbo switch. Whether the light is off or on, holding the mode button gets you instant turbo. With five brightness settings to cover all of your needs the T4K is a must have accessory for any keychain, emergency kit, or outdoor set. USB-C Fast Charging Like the Fenix E18R V2.0 these modes are very well regulated and my measurements confirmed Olight’s specs with constant outputs up to the 300 lumen high mode. Turbo turned on at an impressive 1310 lumens, was still at 1299 lumens after 10 seconds, 1282 lumens at 30 seconds, and pretty much as spec’d dropped to 290 lumens after 90 seconds where it remained at 5 and 10 minutes and for as long as I measured its output. Olight Baton 3 Pro: UK: https://www.olightstore.uk/s/4YA99W US: https://www.olightstore.com/s/F9GB34With the torch off pressing the mode button shows the battery level of the torch with a graphical icon and its voltage. It’s fully charged at 4.2V. Like most Fenix torches I’ve tested there’s no way to get straight to moonlight or turbo mode – something most other torches offer in one way or another. And I’d prefer a slightly warmer, higher CRI LED with a more neutral tint. But the size, build quality, magnetic tail cap, well regulated outputs and Fenix reliability I’ve had first hand experience with for many years with numerous torches, makes this a very tempting offering. Baton 3 Premium Edition Still output is impressive for a relatively compact torch. I measured 1991 lumens at turn on, 1943 lumens after 10 seconds and 1867 lumens after 30 seconds. There was a fairly sharp drop off around 2 minutes in, to 1000 lumens and then a gradual drop to around 650 lumens after 5 minutes, which continued to drop but more gradually for the remainder of my tests. This isn’t too bad, but the output is not regulated above around 125 lumens so is dependent on battery voltage. So again you don’t know exactly what you’re going to get except at the very low levels. Lux Meter: For lumen readings and runtimes, an Adafruit TSL2591 connected to a Raspberry Pi running Ubuntu, using RuTiTe by bmengineer in a custom sphere (build document coming soon, when I have some more time). A UNI-T UT383S is used for candela readings. An Adafruit MCP9808 rounds out the list for temperature monitoring. The torch features a multifunctional OLED real time display screen offering information on the battery voltage, brightness level, user mode and remaining runtime.