MY new Nitecore D20... Waht is wrong??

Hello all,
I received my D20 today (TacticalLEDs.com) I am lovin' it; BUT...
After I put my eneloops in it and playing with it a little I noticed a minor issue.
When I am holding the PD switch to dim sometimes it flickers and turns off.
I say sometimes because it doesn't do it all the time.
I love the feel of my new flashlight and the fact that is loaded with many options. I noticed it does more of that flickering when I hold it to go to brightest from the lowest (it goes to highest possible but at the end it flickers for a second and turns off. I even noticed a few times when I click and hold to go back to the brightest it turns of as soon as I lift my finger from the switch.
Is this a common issue? Is this a connection problem or the smart chip is defected. Please help.
Thanks.

I don't know, but mine doesn't do that. Both my D10 and D20 work perfectly.

You can try cleaning all of the electrical contact points and threads to see if that helps. Deoxit is a favorite for cleaning the electrical contacts.

Probably nothing to worry about - the D20 piston drive is very reliable but out of the box the piston and the little contact ring inside the head can sometimes be a bit sticky. This can cause the symptoms you describe.

It usually wears in with use, so stick with it for a few days and see if it improves. If not a quick clean-up will probably sort things out - there are a number of threads on maintenance of the PD series that will explain what to do.

To start you off there's a good description and photos in Selfbuilt's excellent review:

https://www.candlepowerforums.com/threads/210904

[PS: Please don't start taking the piston and everything apart just yet - you probably won't need to ! But the photos and information are there if you need them ]

I had a similar experience with my old D20. But now after several months of use the piston and its lubrication have ran in. However, sometimes I still have difficulties because of the pressure needed to operate the switch. Esp. during ramping it may happen that I relieve my thumb slightly and the light begins to flicker. So far, I did not find a solution for this as this is due to the design of the pistion drive itself.

deranged_coder said:

You can try cleaning all of the electrical contact points and threads to see if that helps. Deoxit is a favorite for cleaning the electrical contacts.

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