Astrolux FT02

Astrolux FT02 review


The Astrolux FT02 is a mini thrower flashlight that claims to throw 160kcd, which is about triple the amount of the famous and budget-friendly Convoy C8. For its size, that is quite a number. Let’s find out if the claims are true. I’m also curious to see how it stacks up against the mini GT I reviewed.

What you’ll get:

  • Astrolux FT02 flashlight
  • Carton box
  • Manual
  • Spare O-ring
  • Lanyard

The FT02 arrived in a classy box. Although higher-end lights include cheaper boxes, I’m glad Astrolux just walked the extra mile. The package has the basic accessories, a manual, spare o-rings, and a lanyard.


Brand/modelAstrolux FT02
LEDCree XHP35 Hi
Lumens2,200 lm
Beam intensity160,000 cd
Battery config.1*21700

Handling of the light

I’m unsure if you are familiar with the 21700 battery, but it’s 3mm wider than the 18650 battery. Therefore, the flashlight’s body has a larger diameter. Some people like the diameter of an 18650 type flashlight, but I prefer the slightly wider 26650 or 21700 type better. It’s just a tad thicker than a usual 18650 flashlight.

Unlike the Astrolux FT01, the FT02 has only 1 switch. The switch is located on the side, near the head. So you can operate the FT02 single-handed. Later on, I will explain how to change modes etc.

Can it tailstand?

  • Yes, definitely.

Build Quality, Prints and Anodizing 

Although Astrolux once started as a budget brand, it has rapidly grown into a very affordable yet medium-class flashlight manufacturer. The FT02 definitely has some class to it. I couldn’t find any problems with its anodizing nor with the prints or any other parts. The anodizing has a matte finish, which makes it look nicer. The side switch is a little recessed so it doesn’t activate accidentally. All parts fit nicely and are not wobbly.

Threads and O-rings

The FT02 consists of three parts: the head, body, and tailcap. The tailcap is just a tailcap without a switch. The threads and O-rings came slightly lubed. In the picture below, you can see the double spring in the tailcap for max current!

LED, Lens Bezel and Reflector

The Astrolux FT02 has a CREE XHP35-Hi LED for max throw. This is a 12V LED. Its is powered by a single 21700/20700 or 18650 battery. The driver boosts its Voltage to achieve 12Volts.
The bezel seems to be glued as I could not unscrew it by hand. The lens, as you can see, has some purple hue, which indicates a coating. Typically AR (anti-reflective). The LED is very well centered by a plastic white ring in the middle.  The reflector is smooth.


Measured with a cheap digital caliper.

  • Length of the Astrolux FT02: 155 mm
  • FT02 head diameter: 58.5mm 
  • Width body : 29.8 mm


  • Weight Astrolux FT02 empty: 264 gr / 0.58 lb.

Size compared to the BLF GT Mini, Lumintop ODF30, and Zebralight SC700d, from left to right. The FT02 is quite a bit larger than the BLF GT Mini, but it also has a larger head and bigger battery tube.

User Interface:

The Astrolux FT02 has a relatively simple UI fortunately. Sometimes referred to as step-less dimming or ramping.

From off:

  • Press and Hold side switch: lowest ramping mode (it will not start ramping)
  • Single click side switch: Last memorized output mode
  • Double click: Highest output
  • Three clicks: Battery check
  • Four clicks: Lockout mode
  • Five clicks: Momentary mode: you can do more coding, etc, in the Highest output mode.
  • Six clicks: The side switch backlight will either start or stop “breathing”. Which means the LED will ramp up and down continuously as if it is breathing.

From on:

  • Press and Hold side switch: Ramping up brightness / ramping down brightness
  • Single click side switch: turns off
  • Double click: Highest output
  • Three clicks: Battery check
  • Four clicks: Turns off and goes into lock-out mode.
  • Five clicks: Momentary mode: you can do morse coding etc in Highest output mode.
  • Six clicks: The side switch backlight will either start or stop “breathing”. Which means the LED will ramp up and down continuously as if it is breathing.

Moon mode:

There isn’t really a moon mode, but a low mode.

Battery Check mode:

When you enter the battery

  • 00-20% = 1 blink
  • 20-40% = 2 blinks
  • 40-60% = 3 blinks
  • 60-80% = 4 blinks
  • 80-100%= 5 blinks

Lock-out mode:

Yes, by doing 4 clicks in either the On or Off position. Another 4 fast clicks to go back to normal usage.


I couldn’t detect any of my eyes.

Momentary ON:

Yes, you do 5 fast clicks in either the On or Off position. When you click or hold the button, the light is in the Highest output. You have to unscrew the tailcap to go back to normal use.

Batteries and Charging:

The Astrolux FT02 can use multiple types of batteries, being 18650, 20700 and 21700. These kind of batteries usually need a special charger, so even though you buy a flashlight for lithium-ion batteries, you still have to buy a charger. That is unnecessary with the Astrolux FT02, you can charge the batteries with the built-in charge system. According to my USB Amp meter, it charges at a rate of 0.15Amps. This means that a 4000mAh 21700 battery would take about 30+ hours to charge.. That is a little on the slow side. The battery I tested wasn’t empty, so it might charge faster at a lower Voltage. Other reviews pointed out a much higher charge current…. not sure what is going on, but you can see the charger current in the picture.

Using 18650 batteries:

Astrolux included a little adapter for 18650 batteries to fit the 21700 body tube. The white battery adapter gives an 18650 battery just the extra bit of length to make good contact on both the negative and positive sides. However, my Panasonic batteries and other batteries all worked without the adapter!

Parasitic drain:

The FT02 has some parasitic drain of between 4.10mA and 4.15mA. Which is really high… This would mean that a 4000mAh battery would drain in about 41 days. Calculate 4000/4.15=995,98 hours divided by 24 hours per day= 41 days.

The same parasitic drain is measured in the Lock-out mode! So that doesn’t really help either.


Lumens measured in my self-made integrated sphere, calibrated with a Convoy S2+ with a constant 137 lumens out, were received from BLF (Budget Light Forums) member Djozz. The LUX meter used is the Hagner E4-X. Measurements are within the first few seconds of startup. The low mode actually increases brightness slowly, but there is no difference between High and Turbo. So, the max on ramping mode is the same as double-click Turbo mode.

Here are my measurements: Astrolux FT02 with Samsung 40T

ModeI measuredManufacturer Lumens


Measured outdoors at 10 meters with 2 lux meters: Hagner E4-X and Skytronic LX-101.

  • Hagner E4-X luxmeter: battery used: Samsung INR18650 25R : 156200 cd = 156kcd
  • SkyTronic LX-101 luxmeter: battery used: Samsung INR18650 25R : 187600 cd = 188kcd

Banggood has the Astrolux FT02 listed as being 180 000cd. Which is not far off rom the reading on the SkyTronic, but higher than the SkyTronic. This means it is the farthest throwing flashlight running on 1 battery!? If not, let us know!


The runtime was measured using a Samsung INR21700 40T battery, without cooling. High mode dropped to about 60% output within 2 minutes. This continued for about another 50 minutes (about 1100 lumens) when it slowly dropped to about 15 lumens. The light turned off after 10 minutes of running on 15 lumens.

  • Max 1800 lumens: 2 minutes
  • Output at 60% 1100 lumens: 50 minutes
  • Output drops slowly to 1% at 15 lumens: 12 minutes
  • Output at 1% 15 lumens: 10 minutes. 

So it has roughly a 1 hour runtime.


The pictures speak for themselves. Camera settings: ISO 1600, F4, 1/4 second shutter speed, 5000K.

Overall conclusion of the Astrolux FT02


  1. 1800 lumens
  2. Simple but useful UI that everybody can get used to within a minute!
  3. One of the first lights using the new 21700 battery size
  4. 180000cd throw, which is quite amazing for the size of light!


  1. No battery included.
  2. At the time of this review, no other LED tint was available.
  3. Built in the charger is slow on my sample
  4. High parasitic drain

Overall Rating: Very Good

During the testing, the light performed well without any problems. The diameter of the body and texture quite please me. The only “problem” I see is that with 18650 batteries, you have quite a bit of extra room, so you should better buy some 21700 batteries! And the 4.15mA parasitic drain! Because of that, I’d give it a 4 stars.

Disclaimer: Banggood provided the flashlight for review. I always do my best to be as unbiased as possible!

Buy Astrolux-FT02

Not available anymore. Get the Astrolux FT02S instead. Or check out all the other 21700 flashlights.