Need Advice (thrunite TN12)

LED Flashlights – General Info 18650 Flashlights
1

Hi Guys,

I’m just new here on BLF and I recently bought a flashlight from Thrunite which is TN12. Now I have this kind of problem if I’m trying to turn it on or push the tail button it just like a camera flash the light will turned on for about .8 sec - 1sec only, then it will automatically turned off. I don’t know what to do or solution to fix the problem I need your help guys to pin point the problem. I already sent an email to thrunite CS and I’m waiting for their reply.

Thanks,
sledger

2

Welcome to BLF, sledger17. Unfortunately I can’t help with your problem as I do not have that model. Could it be a discharged battery?

3

thank you relic38,

I have 2 18650 and I also have a WF-501B. Both batteries are working fine with wf-501b when I put the batteries in TN12 same result its like camera flash if I turn it on.

4

Hi,Sledger. Sounds like a bad driver to me. My first stlv2 did the same thing. Hopefully, Thrunite will stand up.

5

oh okay, I hope Thrunite will give a solution for this problem. I’m still a newbie when it comes to flashlight and I not even familiar with the driver but I will google it.

thanks for the info Rusty.

6

Its been 24hours since I send the email with the video to Thrunite but until now I havent receive any feedback from them.

7

Be patient 24hours are not that much.

8

Hi Guys I think this is the problem of my flashlight

I think this 2 parts of the rear switch won’t overlap or doesn’t have enough contact even though I’ve already tightened the rear switch any suggestions?

thanks

9

The switch is my first guess. It may loosen by a few screw on and offs. I’d suggest you try using a piece of wire to connect the negative pole of the battery and the lights tube, to bypass the switch and see if the driver works ok without the switch. The weak contacts in the switch may be dropping too much voltage on them and causing the driver to go into protection.

There must be a spare switch in the accessories sent with the light. You may try that instead or add a blob of solder on the PCB where two plates come together to make a sure contact.

10

Thanks for the info Kokopelli I already tried using the spare switch but same result, adding a little bit of solder on the pcb.

11

sledger 17, did you solve the problem in the end?