Question: The left one works for a few minutes and turns off. What can be?

This was helpful (0) | Asked for JBL Tune 120TWS Headphone
Yoel 28-02-2021
I had this problem, with an ear cleaning stick I moistened it with a little bit of alcohol, very little, clean the contacts of both the box and headphones, you sink a little and loose the contacts in the box and it seemed to me that this makes it fit again the contacts and thus began to load again. I hope it serves you as well.

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