Thrunite Ti2 Keychain Flashlight Review

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

Here’s a link to the Thrunite Ti2 keychain flashlight product page.


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!

Short Review

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!

Long Review

The Big Table

Thrunite Ti2 Keychain Flashlight
Emitter: Cree XTE (Cool White)
Price in USD at publication time: $5.99
Cell: 1xAAA
Runtime Graph
LVP? Not really
Switch Type: Twisty
On-Board Charging? No
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.

What’s Included

Thrunite Ti2 Flashlight what's included

  • Thrunite Ti2 Keychain Flashlight
  • Split ring
  • Manual

Package and Manual

Thrunite Ti2 Flashlight manual

Build Quality and Disassembly

Thrunite Ti2 Flashlight

The build quality is good.

Thrunite Ti2 Flashlight tailcap Thrunite Ti2 Flashlight grip area

Thrunite Ti2 Flashlight head off

As you can see, the threads are anodized.  Also, note that the head has grip lines in the right way for actuating the light.

Thrunite Ti2 Flashlight thread details

Thrunite Ti2 Flashlight driver

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.

Thrunite Ti2 Flashlight driver

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.)

Thrunite Ti2 Flashlight

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).

Thrunite Ti2 Flashlight in hand

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.

Thrunite Ti2 Flashlight beside torchlab boss 35

Retention and Carry

There’s a lanyard hole in the tailcap.  A lanyard is not included.

Thrunite Ti2 Flashlight lanyard loop

The body appears to have grooves for a pocket clip, too, but no pocket clip is included.

Thrunite Ti2 Flashlight tailstanding

Power and Runtime

The Thrunite Ti2 Keychain Flashlight runs on a single AAA-sized cell.  I tested with the Eneloop AAA (NiMH) seen below.

Thrunite Ti2 Flashlight with AAA cell Thrunite Ti2 Flashlight with AAA cell installed

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
On 120 45m 140 1.36

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). 10ms5ms2ms1ms0.5ms0.2ms.  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.

Thrunite Ti2 Flashlight in hand

I don’t think the interface could be simpler.  Tighten for on.  Loosen for off.

Here’s a UI table!

State Action Result
Off Tighten head On
On Loosen head Off

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.

Thrunite Ti2 Flashlight emitter

Also as stated above, the emitter and components are on one MCPCB, so emitter swapping will likely require a hot air reflow station

Thrunite Ti2 Flashlight TIR optic Thrunite Ti2 Flashlight on Thrunite Ti2 Flashlight on

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.

Thrunite Ti2 Flashlight beamshot ceiling

Tint vs BLF-348 ( 219b version) (affiliate link)

I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.

Thrunite Ti2 Flashlight beamshot door compared to nichia 219b

I compare everything to the 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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