Thrunite TC20 V2 Review (4000 Lumens, XHP 70.2, USB-C)

Today I am taking at the Thrunite TC20 V2. It’s not the newest model but it’s still recent and an update on the Thrunite TC20 V1. It’s running a Cree XHP70.2 LED, a 26650 battery, and has onboard USB-C charging. If you want a light that can sustain 2000 lumens for more than an hour, listen up. Thanks to Thrunite for “accidentally” sending this to me ?.


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Packaging & Accessories

Standard Thrunite brown cardboard box here with the elastic band, I would call it functional minimalism. Inside is the entire kit with almost everything you need to maintain and use the light for years. You get the light itself, a 5000mAh 26650 Thrunite battery, nylon holster, USB-A to C charging cable, lanyard, a bag of extras including o’rings, button seal, USB port cover, and split ring, a manual and warranty card.


Construction & Design

The light is made from Aluminum and hard anodized black. Build quality is always good from Thrunite and this is no exception. The tail cap provides a flat surface that allows for tail standing and has a lanyard hole. The cap is removable and non-magnetic. Inside there is a stout spring on the tail end only.

The body tube has traded knurls for milled blocks in an almost frag pattern. The corners are well chamfered though so it’s not too aggressive. Square Threads on both ends are anodized, smooth, and nonreversible.

The head features the standard Thrunite electronic switch with a metal button on top, and a small battery indicator LED in the middle. Directly opposite the button is the USB-C charging port that’s covered via a silicone rubber flap. It’s decent fitting and does stay out of the way. The light has moderate milling at the top for heat dissipation and weight reduction. The bezel is flat. The lens is AR coated and the reflector has a moderate orange peel. Overall small but positive design changes from the original.


Retention options include the included nylon holster. It has elastic sides, plastic dring, and a fixed belt loop. It gets the job done but is just of average quality. The light also comes with a branded lanyard and split ring that can be attached at the tail if you wish.


Size & Weight

I measured the length at 118.1mm, the diameter of the body tube at 32.6mm, the diameter of the head at 42mm. The weight with the battery is 242.5g. The light is IP68 water rated.


LED & Beam

The TC20 V2 is running the Cree XHP70.2 LED that Thrunite says is capable of 4000 lumens. It’s available in Cool and Neutral white, and I have the cool white version here. On my Opple meter, I measured 5737 lumens, 66CRI. The tint didn’t have any green tinge to it and it seems to be a constant current driver. 

You would think this would be a pure floody light but it actually has a decent amount of throw to it at the hotspot that’s fairly tight.

Mode spacing here is less than ideal. I am very happy that it still has firefly at 0.5 lumens, but with 3 main modes to cover 0.5 to 1800 lumens, there are some pretty big jumps there between medium and high going from 350 to 1800. Another mode somewhere around 1000 lumens would be nice at least.

I will insert the output results I got from my lumen tube testing here. 


Heat & Runtime

The light is able to sustain it’s 3500+ lumens for 3:45 before stepping down to around 1600 lumens where it will run for 45 minutes, before stepping down to about 1400 lumens to finish out the remainder of it’s 1:45:00 runtime. Peak heat during this time was about 58C. Running on medium nets an impressive 11:15:00.

Where this light really shines in my opinion is the amount of time it can sustain well over 1000 lumens. This light maintains over 1400 lumens for over an hour. I frequently get asked what light can I buy that will stay over 1000 or 2000 lumens for an hour, well here is a good option for you if that’s what your looking for.



UI here is Thrunite’s standard. Single press to turn on, long press once on to cycle up between the 3 main modes, double press to go to Turbo, triple press to go to strobe. It’s a very simple interface, and it’s easy to use which is nice but also limiting. A fast ramping interface would work pretty well here too given the limited number of modes and wide range of outputs it must cover. 



The TC20 V2 has onboard USB-C charging that’s protected by a silicone rubber port cover. I charged the light charged the light from LVP to full at 4.15v in 3:48:00. The curve here wasn’t as clean as I am used to seeing but nothing that I was concerned about. You are able to use the light during charging but only in low and medium modes. It charges via USB-C to C or PD without an issue. While the included battery is officially rated at 5000mAh, I tested mine with my Vapcell S4 Plus at 5500mAh.  


Final Thoughts

The 26650 flashlight form factor seems to have kind of fallen out of popularity with the increasing availability of 21700 batteries having similar capacities, but I like the 26650 size in my hand personally from an ergonomic perspective.

One of the best features here in my opinion is probably how long this light can sustain 1500+ lumens before stepdown. That’s a feat that many high lumen output lights just can’t do due to heat and battery fatigue. This does that with ease. That said mode spacing here could be better to give you something between 1853 lumens and 320 which is the jump between high and medium.

This is going to be a good all-around use light, I think it would be a good option for something like camping or emergency prep as it’s good around, has quite a bit of life at higher lumen outputs and size isn’t as critical of a feature.