Review: Vollsion UC20

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Budda
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Review: Vollsion UC20

I received the Vollsion UC20 for the review by Vollsion, curtesy of Ray.

The specs for the UC20:

The U20 comes in a cardboard box

Padded foam for keeping the light safe

Inside the box: UC20, glass breaker and spare orings

UC20
The metallic cover of the electronic switch protrudes a lot. This is the easiest side switch to locate I found on a flashlight.


The tailcap is flat and has a hole with threads for the camera tripods.

There is some knurling on the body.

You can also mount the glass breaker in it. The glass breaker can also be used to attach the light around.

The UC20 features a XM-L2 emitter in the OP reflector. Stainless steel bezel at the head, with AR coated glass

.
The head is the only part of the light that can be take apart with bare hands.
Anodized threads allow a physical lockout.

Positive contact point at the head: a raised dot (no physical protection against polarity inversion).

As you can see there is a lot of room for the 18650. The light rattles when shaken.

I tried to take the light further apart, but it was not possible.

Size comparison

UI
A single click turns the light on and off.
While on, keep pressed the switch to cycle between the modes: hi, medium, low, hi, medium, low… in loop. The light has memory mode.
A double click activates the strobe mode. The U20 doesn’t have memory mode for strobe.

Output and runtime
Output and runtime have been tested using an unprotected 18650 LG MJ1 battery.

My measurements are lower than the specification.

Sampling time is every 2” for high mode, every 90” for medium mode.
When the runtime at high mode was stopped, I measured the battery resting voltage: 2.70 volts.

Beamshot at 0,5 meters from the wall




The big XM-L2 die gives a wide beam with a big spot, suitable for close distances.
On my UC20 the tint is on the neutral side, with a clear green dominant.
To my eyes there is no PWM on high mode, but it is evident at mid and low mode.

My thoughts
Fit and finishes are fine.
This UC20 looks a lot like the Roche F6 (with a differently shaped glass breaker), but has a different driver.
When running the UC20 with unprotected short 18650, the light will turn off if you hit it because the battery loses contact with the positive pole at the head. Using protected batteries prevents a bit this because you will need to hit harder. But the issue is still present, especially if you it with the tailcap.
I believe this light is better suited for a gift to somebody who is not very practical with lights. Put inside a protected 18650 and set it to max mode, without saying anything. He’ll just turn it on and off.
For a non flashlight guy having 90 minutes at 600+ lumens is not bad at all. After 90 minutes the output decreases slowly, and you still have 50 minutes of usable light before the battery is really drained.
As a flashlight guy I am not impressed by this light. The body is well made, but it needs a driver without evident PWM and a longer spring (or shorter body).

Thanks to AntoLed for lending me the camera and the luxmeter.

All my reviews, in italian and english, here: Lumenreviews.com

Edited by: Budda on 10/09/2016 - 17:03
Liber8
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Build quality looks nice

Budda
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As I said, construction is ok.

The problem is in the lenght of the spring, the driver and the emitter.

I can imagine that I had a sample with the green tint, from the other reviews no one mentioned it (as far as I know)

All my reviews, in italian and english, here: Lumenreviews.com

Budda
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Runtime at mid mode is ready

All my reviews, in italian and english, here: Lumenreviews.com