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It would be nice if there was an actual TURBO mode within 500 to 1,00 lumens range, rather than a 4,000 lumens MOMENTARY TURBO mode. However, Nitecore probably went with a MOMENTARY TURBO instead, much like the Nitecore TM10K model. Tint & CRI Olight doesn’t specify the LED used but I measured a colour temperature of a fairly cool 5989K, a very slight green tint and a CRI of 68.
Battery Life: Always look at the batteries the flashlights are shipped with. The larger the capacity, the longer batterylife you get. Turbo is accessed with the light on or off by holding the mode button down and is a momentary function that will return to the previous state once the mode button is released, or once the countdown timer on the screen ends. The length of the countdown timer will vary depending on how hot the torch is, and will be shorter if the torch is already quite warm. Ultra-low can be instantly accessed while the light is off by holding down the power button. The lower modes are very well regulated with constant outputs, although I did find outputs a little lower than spec’d. Like the Nitecore T4K there’s no mention of the ANSI standard in the manual or online, but even so I didn’t see 2000 lumens in any of my tests even at turn on. The runtime test was done with the fully charged Nitecore T4K in HIGH mode (200lm), with an ambient temperature of about 21 ° C and without forced ventilation. Good durability in HIGH which reflects the values declared by the house. As you can see from the graph at the end of the test, the T4K suddenly turned off. When switched on again the display showed 3.20V.A red charging LED underneath the lid comes on when you insert the torch and turns green when the torch is fully charged. The Nitecore T4K provides two user modes: demo and daily. In Demo mode the torch will automatically turn off if there has been no operation in 30 seconds; in this mode a countdown will be displayed on the screen. In Daily mode the light stays on until turned off by the user. To switch between the modes, press and hold the power and mode buttons simultaneously until the LED flashes. 1 flash indicates the torch is in demo mode and 2 flashes is for daily mode. 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... The LEDs behind the TIR optic provide a very floody beam with almost no hotspot – together with the natural colour temperature it’s a great torch for walks. With a slightly lower maximum output than spec’d I measured 116 metres of throw and 3383 candela – Acebeam quote 153 metres of throw and 5875 candela. The magnetic charging cable snaps onto the magnetic tailcap of the torch with a full charge taking up to 3.5 hours. The LED on the charging cable changes from red to green when fully charged. I did find this often turned green a little early – but it still continued to charge slowly.
The 4 LEDs sit behind a TIR lens and the beam is floody, but with the huge amount of output the throw is still 209 metres with an intensity of 10900 candela. Although this is still less than the Fenix PD25R with only 800 lumens of output – which it can also hold for a lot longer. It really does depend on what you want. 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. There’s a few torches that didn’t make this top ten but deserve a mention. The Olight Baton 3 Pro is the most compact 18650 torch I’ve tested and almost the perfect EDC torch. Olight Baton 3 Pro (natural white version) in turbo mode
Final thoughts
The PD25R is very simple to operate. The tail switch turns it on and off and the side switch cycles through the brightness levels. From a 70 hour 5 lumen eco mode, to a 16 hour 30 lumen low mode, a 2 hour 50 minute 150 lumen medium mode, 1 hour 30 minute 350 lumen high mode and a 800 lumen turbo mode that will operate for up to 45 minutes but will step down in brightness as the torch heats up. The side switch LED will indicate the battery remaining just like the E18R when the torch is on. And some longer batteries with protection circuits won’t fit, for example this Keeppower one. But I did find this Lumintop 14500 with built-in USB-C charging fits – I would have preferred Wurkkos included a battery like this with the torch – it would be far more convenient for newcomers to these higher performance torches. The torch weighs just 51.9g (1.83 oz). With the flashlight both on and off, press the POWER and MODE buttons simultaneously to switch between the DEMO and DAILY modes. The LED will flash to indicate the currently selected mode: Another information on the display is that of the 4000 lumens TURBO mode (lasting about 10 seconds). Let's see the sequence:
The Acebeam E70 Mini comes with a short USB-C to USB-A cable, a lanyard, spare o-rings and a user manual. Like turbo mode, you can also immediately activate ultralow mode by holding down the power button with the light off. Probably the most impressive feature of this torch for its size is its beam profile. It has 250 metres of throw or 15530 candela of intensity. But even with the tight hotspot from that deep smooth reflector, there’s still enough spill for it to be useful as an EDC torch.
Design and features
Despite the exaggerated outputs this is a great little torch with bright high CRI LEDs, good build quality and all the flexibility of its Anduril 2 firmware. Fenix E18R V2.0
The switch has a battery indicator light that comes on with a single press when the torch is off, or for a few seconds when you turn the torch on. Solid green and the torch has over 85% charge, flashing green 50-85%, red 25-50% and flashing red if it’s less than 25% charge remaining. This is handy but only works with the supplied Fenix battery – the ARB-L16-700P. HOLD (MODE) [~1 sec] – Direct access to MOMENTARY TURBO, releasing switch will return to previous mode. One of the obvious features of the T4K is its size and portability. Whether you want a flashlight on-hand for emergencies or if you need it for a midnight stroll, the tiny yet powerful T4K travels and stores easily. It’s pretty compact and lightweight at only 75g but its huge head and deep smooth reflector gives it a throw of a quite staggering 585 metres with an intensity of 85000 candela! And the magnetic tail cap, mostly intended for snapping to the charger, is also just about strong enough to hold the torch in any orientation for hands free operation.
The thing is though, I’m very open to ridiculous things on lights, so this is like handing treats to a child. It’s a little less convenient removing the battery to charge it, but you don’t have to worry about making sure any external ports are sealed. The torch comes with a USB-C charging port, enabling convenient charging through various USB power sources. It also has a power bank function, allowing users to charge other devices on-the-go using the torch's battery. Pushing the mode selection button brings up a battery level meter that tops out around 4.2v, which is the Li-ion standard for max charge. Nitecore has also built over-charge protection into the T4K, as well as over-discharge protection.
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