It seem USBC plug is working fine. The problem is when Powercore is showing one led flash I try to charge with QuickCharge (that is working totally fine tested with Switch and GoPro) Power core is start to recharge but only in one minute it show four LED and it is look like fully charge but actually it is not charging anymore.
Thanks for advice
Dear Ko_Baytar @Ko_Baytar,
Thanks for contacting us and letting us know your issue.
We regret to hear the PowerCore2010 Switch edition didn’t work and so sorry for all the inconvenience caused to you.
If you have a usb-a to usb-c cable (such as this one: https://www.amazon.com/gp/product/B01A6F3WHG ), please connect the usb-c port and output port at the same time to reset the indicators. After that, please use your Nintendo Switch wall charger (or Apple 61W or 87W USB-C wall charger) to recharge the battery again to see if the problem can be solved.
If the problem persists, you can contact us via firstname.lastname@example.org and we will be more than happy to help you out as per the 18-month warranty policy.
I have had a similar issue. Ill see full charge on my powercore, but when I plug in my switch or another device it’ll start to charge for maybe a second and then 2 of the LED’s will blink rapidly and that device will stop charging. After that the power core shows that it is dead.