Weird problem with Nitecore P12 flashlight

[Yohan1994]

Hi, glad to be a new member here!
I'm facing a really weird problem with my brand new nitecore p12 flashlight.
When I first charged the battery that it came with (nitecore 21700), I put it back in the flashlight and it didn't work. I realized that I had to unscrew the flashlight almost fully and then it worked fine. Everytime I tried to screw it again and it pressed the battery more, it stopped working again. After a while, even though I did nothing, it was working normally again.
I thought it had to do with the cable that I used to charge the battery, so I bought an original nitecore charger. BTW, the charger displayed that the battery is good. I fully charged the battery again, put it back in the flashlight and same problem occurred! The tail has to be just a bit screwed for the flashlight to work. This time, it hasn't been fixed yet. Any ideas?!
Thanks in advance !!

 

[Splitrail]

e-mail or call customer service.
they are very responsive.

 

[kosPap]

there is the chance that the pressure of the battery (being under spring pressure) pushes the tailcap innards off-contact with the retainig ring. which also works for electical contact to the switch inside.

 

[crn3371]

Wondering if 21700 is marginally too long for it. As said, reach out to Nitecore. I have the original P12 and it's my most used light.