[Review] Armytek Elf C1 || 1 x 18350, Samsung LH351D || Output, Outdoor Beams and Power Regulation Graph

The flashlight was sent to me by Armytek.
Here’s the product’s link (non-affiliate): Armytek Elf C1
There’s also this coupon code available for -15% off: BILAKOS15

The Armytek Elf C1 comes in a nice cardboard box.

The following accessories are included in the bundle:

  • Headband
  • 2 x replacement o-rings
  • Pocket clip
  • Armytek branded 18350 cell
  • Micro-USB charging cable
  • User manual

The Elf C1 is a compact 18350 flashlight / headlamp.
It comes with Armytek’s chalky feeling anodization, which I personally like very much, and its overall fit and finish is excellent.

In order to allow the flashlight to also be used as a headlamp, Armytek includes a good quality head band.

Here’s the light mounted on the plastic holder of the band.

The headband contains double loops, which allows for easily adjusting its size on the go.

The flashlight is operated via a side mounted e-switch.
The switch is covered by a semi-translucent rubber boot and is quite tactile.

Next to the e-switch, we find the charging interface of the flashlight, which is secured from moisture and dust by a rubber flap.
A micro-USB port is used for charging the flashlight.

Once plugged it, the indicator LED that resides in the e-switch will light up to indicate the charge’s state.

Looking into the head, we can see a TIR reflector and a polished metal bezel which keeps it in place and protects it.
The flashlight comes with a Samsung LH351D emitter. Cool white and warm white variants of the emitter are available.

Both the tail and the top portion of the head are flat, which allows the flashlight to stand vertically.

Only the tail can be unscrewed, since the head and body are glued together.
The tail threads are cleanly cut and arrived nicely lubricated

The tail piece contains a thick spring.

A dettachable pocket clip is also included.

The pocket clip allows for a deep pocket carry.

Finally, an Armytek branded 18350 battery is also part of the kit.
The battery is rated with 900mAh of capacity and is flat top.

User Interface
The Armytek Elf C1 comes with the company’s proprietary firmware.
Here’s all the supported actions:

Turn on/off: Single press.
Mode cycle: Long press (Main 1 > Main 2 > Main3).
Turbo: Double press.
Firefly: Long press while off. Keeping the button press will initiate a mode cycle (Firefly1 > Firefly2 > Main 1 > Main 2 > Main 3).

Mode memory is present, and it’ll even memorise Turbo.
Low Voltage Warning and Low Voltage Protection is also present.


Here’s my output measurements for the flashlight.


As we can see, the Elf C1 pro pushes 983 OTF lumen at turn on.
The manufacturer’s output ratings seem to be pretty precise.
Mode spacing looks very good overall.

Power Regulation
Here’s a power regulation graph I’ve created for the Armytek Elf C1 using my bench power supply.

What we can see in the graph:

  • Turbo is regulated down to 3.9V. After that, the Current/Volt line follows a linear relationship.
  • Main 3 is regulated down to 3.2V. After that, the flashlight will step-down to Main 1.
  • Main 2 is regulated down to 3.1V. After that, the flashlight will step down to Main 1.
  • Main 1 is regulated for the whole span of the test.
  • Overall, the Armytek Elf C1 provides a very usable regulation pattern.

Outdoor Beamshots
Finally, here are some outdoor beamshots of the Armytek Elf C1