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Vollsion UC20

 Budda    01 Oct 2016 : 03:15

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

The specs for the UC20:
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The U20 comes in a cardboard box
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Padded foam for keeping the light safe
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Inside the box: UC20, glass breaker and spare orings
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The metallic cover of the electronic switch protrudes a lot. This is the easiest side switch to locate I found on a flashlight.
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The tailcap is flat and has a hole with threads for the camera tripods.
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There is some knurling on the body.
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You can also mount the glass breaker in it. The glass breaker can also be used to attach the light around.
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The UC20 features a XM-L2 emitter in the OP reflector. Stainless steel bezel at the head, with AR coated glass
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The head is the only part of the light that can be take apart with bare hands.
Anodized threads allow a physical lockout.
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Positive contact point at the head: a raised dot (no physical protection against polarity inversion).
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As you can see there is a lot of room for the 18650. The light rattles when shaken.
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I tried to take the light further apart, but it was not possible.

Size comparison
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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.
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My measurements are lower than the specification.

Sampling time is every 2” for high mode, every 90” for medium mode. Runtime Zpswxaxtyr6
When the runtime at high mode was stopped, I measured the battery resting voltage: 2.70 volts.

Runtime2 Zpsqhd0xi5j

Beamshot at 0,5 meters from the wall
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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.