Thrunite Ti2 Keychain Flashlight Review
The Thrunite Ti2 keychain flashlight offers a very simple user interface (tighten for on, loosen for off) and runs on one AAA battery.
Official Specs and Features
Available is black and green (seen here) Thrunite Ti2 keychain flashlights. A BSS special edition is available in brown, too. They are all the same inside though, with Cree XTE emitter in cool white.
Depending on what you pick specifically, you can get these for around $5.79 on amazon!
For the price, I’m going to call this one “hard to beat.” At under $6, it’s perfectly fine. The output is higher than claimed and the throw is too. The interface is foolproof, and it’s available in black or green. It’s even possible to get a package of 10 for $30!
The Big Table
|Thrunite Ti2 Keychain Flashlight|
|Emitter:||Cree XTE (Cool White)|
|Price in USD at publication time:||$5.99|
|Claimed Lumens (lm)||120|
|Measured Lumens (at 30s)||140 (116.7% of claim)^|
|Candela per Lumen||4.3|
|Claimed Throw (m)||40|
|Candela (Calculated) in cd (at 30s)||58lux @ 2.847m = 470cd|
|Throw (Calculated) (m)||43.4 (108.5% of claim)^|
|Item provided for review by:||Thrunite|
|All my Thrunite reviews!|
^ Measurement disclaimer: Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.
- Thrunite Ti2 Keychain Flashlight
- Split ring
Package and Manual
Build Quality and Disassembly
The build quality is good.
As you can see, the threads are anodized. Also, note that the head has grip lines in the right way for actuating the light.
A bit hard to see here, but that MCPCB has two holes. It’s possible to just unscrew that right out. The “reflector” (really seems like just a plastic cup) comes out too.
The electronics are one piece here. You can see the button and other components; directly on the other side of that is the emitter. It’ll be possible to reflow some other emitter here, but you’ll likely need to use a hot air station. (I believe the XTE footprint is 3535.)
Size and Comps
60mm x 14mm
7.2g without battery.
If the flashlight will headstand, I’ll show it here (usually the third photo). If the flashlight will tailstand, I’ll show that here, too (usually the fourth photo).
Here’s the test light with the venerable Convoy S2+. Mine’s a custom “baked” edition Nichia 219b triple. A very nice 18650 light.
And here’s the light beside my custom engraved TorchLAB BOSS 35, an 18350 light. I reviewed the aluminum version of that light in both 35 and 70 formats.
Retention and Carry
There’s a lanyard hole in the tailcap. A lanyard is not included.
The body appears to have grooves for a pocket clip, too, but no pocket clip is included.
Power and Runtime
The Thrunite Ti2 Keychain Flashlight runs on a single AAA-sized cell. I tested with the Eneloop AAA (NiMH) seen below.
There’s just one mode, and here’s a runtime graph of it. Nothing really surprising here, I’d venture.
Modes and Currents
|Mode||Mode Claimed Output (lm)||Claimed Runtime||Measured Lumens||Tailcap Amps|
Pulse Width Modulation
The single mode does not utilize PWM.
For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor. Also, here’s the light with the worst PWM I could find. I’m adding multiple timescales, so it’ll be easier to compare to the test light. Unfortunately, the PWM on this light is so bad that it doesn’t even work with my normal scale, which is 50 microseconds (50us). 10ms. 5ms. 2ms. 1ms. 0.5ms. 0.2ms. In a display faster than 0.2ms or so, the on/off cycle is more than one screen, so it’d just (very incorrectly) look like a flat line. I wrote more about this Ultrafire WF-602C flashlight and explained a little about PWM too.
User Interface and Operation
The Thrunite Ti2 Keychain Flashlight is a twisty interface flashlight.
I don’t think the interface could be simpler. Tighten for on. Loosen for off.
Here’s a UI table!
One quibble here: You really have to tighten the head more than I want to have to in order to get the light “on.” When in an “on” state, the head is quite tight.
LED and Beam
Thrunite is using a Cree XTE emitter on the Ti2. As stated above, I believe this is a 3535 footprint emitter.
Also as stated above, the emitter and components are on one MCPCB, so emitter swapping will likely require a hot air reflow station
LED Color Report (CRI and CCT)
I measure this at over 7000K (which is very cool white) and with low-ish CRI.
These beamshots are always with the following settings: f8, ISO100, 0.3s shutter, and manual 5000K exposure.
Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)
I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.
I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!
What I like
- Low cost
- Simple user interface
- Good color options
- Meets output specifications
- Also meets throw specifications
What I don’t like
- Cooler than 7000K
- Low CRI
- No pocket clip
- Lanyard is not included
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