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Thrunite TN4A Hi

 Budda    15 Jan 2017 : 16:25

I received the Thrunite TN4A HI NW from Thrunite for the review.

5% Discount! Coupon Code:THRUNITE, For Official Website Only (link is external)

Amazon US: (link is external)

_Thrunite Specs for the TN4A HI NW:

Adopts latest CREE XP-L HI LED technology to give great light efficiency. Compact thrower with high quality beam from smooth peel reflector. Advanced electronic switch with low voltage indication for silent operation. ThruNite ITC (intelligent temperature control) technology to prevent possible light damage from overheating. Six modes available: Firefly, Low, Medium, High, Turbo and Strobe. Reversed polarity protection system prevents damage to the light. Ultra clear tempered glass lens with anti-reflective coating. Aircraft grade aluminum body structure with knurling for firm grip. Premium type III hard anodized anti-abrasive finish. Memory function to set any mode (except for Firefly, Turbo and Strobe) for immediate use. Applicable for AA batteries to use economically everywhere.

Specifications LED: CREE XP-L HI LED with a lifespan of 20 years of run time. Runs on: 4 x AA batteries (not included). Working Voltage: 2.75V-8V. Output mode/Runtime(tested with Four NIMH 2500MAH batteries) -Strobe (1050 lumens/150 minutes) -Turbo (1050 lumens/56 minutes) -High (520 lumens/150 minutes) -Medium (120 lumens/14 hrs) -Low (14 lumens/93 hrs) -Firefly (0.2 lumens/80 days).

Peak Beam Intensity: 52340cd. Max beam distance: 457m. Impact resistant: 2 meters. Waterproof to IPX-8 Standard (1.5 meters). Weight: 218.6g without battery. Dimensions: 111.5mm in length, 45.5mm in diameter. Accessories: Holster x1, Spare O ring x2, Battery Carrier x1(inside the flashlight), Lanyard x1._

The light comes in this cardboard box.

Well protected inside the sheath and with black plastic foam.

The TN4A HI comes with a manual, sheath, a silica bag, lanyard, spare o-rings, spare switch cover.

Honestly, I expected the TN4A HI to be much smaller. The light has a cylindrical design, with some knurling on the body.

It is a really compact 4xAA light.

The electronic switch at the head, only element of control of the light, has a metal cover and a LED underneath it. It is positioned in the only raised and squared portion of the light to make it easier to find. In the accessories there’s a clear rubber switch cover, if you want to replace the metallic one.

The emitter is a CREE XP-L HI NW, perfectly centered thanks to a gasket, in a smooth reflector. The glass has AR treatment and a metallic bezel with a sanded finish.

The tailcap is flat and has a lanyard hole

With bare hands, the light can be divided into body and head. The head has a golden spring as contact point for the positive pole.

Inside the body, with anodized and squared threads, there is the carrier for the 4xAA batteries. Interestingly, in the carrier the springs are not equal, 2 are longer and 2 shorter.

The carrier has several metal parts and looks solid, even if some parts came scratched. The contact points for the batteries are golden, but not the contact point for the driver.

Inserting the batteries in the carrier with the correct polarity is easy, and the carrier can be inserted with either of the faces facing the driver.

The cordura sheath has a plastic D-ring, a belt loop and is MOLLE compatible, and closes with Velcro. The TN4A HI can fit in the sheath either way. The inside of the sheath is not very well padded and shows some marks already out of the box.

Click the switch once to turn the light on and off.
When the light is on, keep pressed the switch to cycle between low, medium and high mode.
When the light is off, keep pressed the switch to turn the light on at moonlight mode.
A double click will activate Turbo mode (works with the light on and off). A following double click will activate strobe.
The light does have memory mode for low, medium and high modes only.

When you turn the light on, the LED underneath the switch will turn on blue, and will become red when the batteries need to be replaced.

There is no electronic lockout, you can physically lockout the light by untwisting the head from the body.

*Beamshots *at 0.5 meters from the wall.

The spot is rather small and this will make the TN4A HI a great thrower for its size.
The NW tint on my sample is really pleasant for my eyes, around 4000K.
There is no PWM sign at any levels according to my eyes.

100 meters at the tree, measured both with laser telemeter and google maps.

No problem for the TN4A HI NW. The spill is wide enough for a thrower.

Output and runtime
Tested with Nimh Batteries: Panasonic Eneloop XX Pro 2500mAh and with Amazonbasics AA 2000mAh.

Considered that the specs are the one of the CW version, the values are right.

Thrunite claims that the TN4A HI has a built in thermal sensor that affects the stepdown at max output. Let’s test it.

There is indeed and it works, not only preventing the big stepdown at the beginning of the test.

But also keeps the output higher compared to the uncooled test until the batteries are empty.

When the cells are almost empty, the light switches to a dim level, a few lumens, for a long additional time.

Here is the runtime of the “few lumens” level, that I cut from most runtime plots.

My thoughts
The light is well built and finished.
The TN4A HI offers a great throw, output and regulation, packed in a small form factor (consider that it is powered by regular AA batteries).
The UI is good: direct access to lowest mode, turbo and memory mode, and the levels are well spaced. I like also the “few lumen level” that is present an all the tested levels.
I don’t like too much the battery indicator, it should have an intermediate state between the 1) batteries are fine, 2) batteries need to be replaced.
I always like when a light comes with a sheath, I believe it makes the light easier to carry (and therefore increases its chances to be used) and it protects it. However, I’d like the sheath built with cordura with higher denier number, and double layer (cordura also on the inside).

This is a good light for those who need a good amount of throw, with a simple UI, in a compact factor, running with AA cells.

Thanks to: AntoLed for the camera and the luxmeter.