Hi BLF!
This is my review of the Lumintop GT Nano flashlight.
The flashlight was bought from www.nealsgadgets.com (non-affiliated).
Thank you Neal for the fast shipping (10 days from shipping to arrival) and for the 10440 tube 
To check some more information about this flashlight, check:
Some reviews:
lock: [Review] - Lumintop GT Nano - 450 lumen, 300m, 10180 80mAh - by Lock
lumeniac: https://budgetlightforum.com/t/-/64893
zeroair: Lumintop GT Nano 10180 Thrower Flashlight Review - ZeroAir Reviews
1lumen: Lumintop GT Nano review | Smallest long-range flashlight | 1Lumen.com
DISCLAIMER: I don’t do runtime, lumens or candela measurements. If this is important information for you, please consider searching other sources of information. Or…buy yourself the flashlights and the tools for that Thanks for understanding!
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GENERAL SPECIFICATIONS
Body Colour: Black
Material: Aluminium
Emitters: Osram KW CSLNM1.TG (aka W1)
Lens: Glass, AR Coated
Reflector: Smooth
Battery: 10180 3.7V Li-Ion (included) / 10440 3.7V Li-Ion (not included)
Switch: Electronic Side Switch
Max runtime: NA
Max beam distance: 300m
Max output: 450 lumens
Candela: 23400cd
Waterproofness: IPX8
Impact resistance: NA
Low Voltage Warning: Yes (detailed below)
Reverse Polarity Protection: NO 
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PACKAGE: Flashlight and Accessories
First I gotta say this: I was hesitant to buy this flashlight! For a while, it was the non-existence of the 10440 tube (which then saw the daylight :partying_face: ) Then I saw people mentioning “it is a toy”, “it is a gimmicky thing”, “it’s so small”… But, you know, I like small lights, so I decided to give it a try.
As I was going to buy the FWAA from Neal, I reached him and asked about the 10440 tube and he managed to get me one. So, thank you Neal!!
In the flashlight box (thick cardboard box, Lumintop branded, with foam inside) I found: GT Nano flashlight, 1 lanyard, 2 o-rings, 1 carabiner with split ring, 1 user manual, 1 USB to Micro-USB cable, and 1 charging adapter. ´
The flashlight had the 3.7V Li-Ion 10180 battery already installed and protected on the + pole with a plastic sheet to prevent activation or draining during shipping
The 10440 tube was carried inside one of the FWAA boxes.
THE FLASHLIGHT
What can I say about the GT Nano? It is definitely a short flashlight when using the 10180 tube 
It is cute! Really! But then you turn it ON and ‘BANG!’ you see that beam of light out of it and think “How dare you?” 
I didn’t know what to expect from this flashlight, it could be just a hype, or it could be just a toy. Or it could surprise me, and it did, not only for the size, but also for the output, both the lower and the highest! This thing throws far :o
And this thing is also dim as few lights.
From the top to the bottom, what it has:
- unscrewable bezel without any etching or engraving
- AR Coated glass lens, o-ring, SMO aluminium reflector and white gasket, above a DTP copper MCPCB, in which the Osram LED is installed
- in the head there are some cooling fins right above the side e-switch that is covered by a rubber button
- under it there is a location RED led, which can barely be seen, only in the dark and at close range
- below the switch there is the engraving of the flashlight model and the Serial Number
- the 10180 tube is only a bit taller than the size of a thumb finger nail, and it has triangular threads, an o-ring and a spring inside
- the spring seems a bit loose inside, but it never felt from the tube
- the tube also as some knurling and a lanyard hole, and on the bottom there is the “bunny” logotype on white
- as for the 10440 tube, it also has some knurling and some flat parts, a layard hole, an o-ring, but it has no bunny logo on the bottom
- the 2 tubes have different anodizing types, being the 10440 a bit more shinny than the 10180 one
- I tried the lanyard in both tubes and it can be attached…with some pointy help, as the holes are quite small
- as for the split ring in the carabiner, it can be put in the lanyard hole, but then, due to the thickness and shape of the ring, it cannot be maintained there in a functional way
- the charger adapter can be fit in both tubes, but I only managed to make it work with the 10180 battery, maybe due to threading issues of the type of battery
Here you have the reflector and lens measurements for eventual modding or replacements
Concerning ergonomics the flashlight can be operated both with thumb or index fingers, depending on the position you want to use it and eventually the chosen tube configuration.
About the weight and dimensions, well…the GT Nano is a reaaaally lightweight flashlight, even with the batteries in it!
With the 10440 tube, it becomes a bit longer, but even with that it is a thin flashlight (despite the larger head)
As for the charger adapter – to be used with the 10180 battery - , it can be used with the included cable or other Micro USB cable you have around. It has a plastic screwable protection where the flashlight tube should be put.
When I tried to use mine I had some trouble making it work well, as there was no contact between the pads inside. Then I made it work and charged the small battery.
When charging the light is RED and when charged it becomes GREEN!
I am not able to make a current test either! So…I’ll be punished in hell for that, I’m sure :smiling_imp:
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USER MANUAL and USER INTERFACE
Similarly to what I’ve just done in the review of the FWAA (“REVIEW”: Lumintop FWAA – 14500 – Anduril 2 – Triple Nichia 4000K & 5000K [Pic Heavy]), I will not get into details about the user interface. NarsilM has been detailed and explained before in charts, threads and videos and in the User Manual the explanations are (at least to me) clear on how to change between the different settings and modes.
I’ve tried both and I can tell that I prefer the Ramping settings, and I enabled the moonlight mode to be the lowest possible! I really like how low it can go!
I wish there was the possibility to use other levels as “momentary modes”, including moonlight, but it doesn’t seem to be possible.
Apart from this, the Ramping setting provides a simple and “no-brain” interface, with ramp up and down and quick access to turbo! Me likes
click for larger photos
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FLASHLIGHT COMPARISON
Time for some flashlight comparison, showing how tiny the GT Nano can be, and how big are other lights too
Vs AAA Flashlights (unbranded zoomie, Sofirn CO1S. Nitefox K3 Mini, Tool AAA Ti, Lidl Zoomie)
Vs DQG Slim Ti 1/2 AA
Vs FWAA
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BEAMSHOTS
And now let’s “let” this Nano shine.
There is no visible PWM, both at human sight and on camera. Only that “flicker” from the driver, but not visible if not zoomed to a close range.
The minimum range of this light goes from 0.5m to 1m on the lowest moon level, up to – at least – 290m , as seen on the photos below.
I really like the beam of the flashlight, specially outdoor, as some of the artifacts on the beam caused by the type of LED and SMO reflector are not perceivable. It really throws far for such a small light.
It also gets hot quite fast, given the thin walls and good thermal path. I didn’t get any blueish tint when using 10440 battery.
15m
120m
65m
130 m
290m
I made a comparison with my Eagleye X3R, which I moded some time ago with the same type of LED, led4power driver and smooth reflector. Here’s a comparison between both, the GT Nano is on the left.
I will try to get some even cleaner beamshots if the night lets me
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OVERALL APPRECIATION
Some “glam” photos before overall appreciation
Well, this tiny GT Nano flashlight, which I prefer to use in the 10440 version, is a really cute light! I do not agree that it is a toy, but I acknowledge that it may not be taken seriously as a “flashlight” if someone is looking to use it other way than a keychain flashlight or for some small bursts of light in a throwy way.
I see myself carrying it for some fun but also for something more than that, despite the short capacity batteries and the fact that it gets hot fast on Turbo. I find it funny to use, but not gimmicky, though.
I do not see it as a “fragile” flashlight, despite I guess it must be well taken care of, to make it last!
I like it compact size even on 10440, being a well built flashlight without apparent flaws. I wish the switch red backlight was stronger although it could imply bigger drain for the already small batteries.
The lanyard holes on the tubes could be a bit larger to make the lanyard and the split ring enter more easily.
I also think that BLF designed a great light (the GT) and that despite this is a miniature GT, it proves that the concept was good and that there was a great work making it!
If you have any questions or comments, let them come!
I know you’ve got the aluminum one… and I wonder if perhaps the metal might make a difference. I’m thinking I might need to do an alcohol swab to the threads inside and on the tube. What puzzles me is that when the tube is removed and I start screwing it on, there’s no electrical contact. Switch LED isn’t on. I can turn it about 3/4 of the way on and it’s still not connected. But once I do it all the way and connect, unscrewing it shows an unbroken circuit ALL THE WAY to the end! I don’t get it.