External powerpack and phone do but notice reach other - but charging works when tricked

[Android Central Question]

Apparently, my powerpack, phone, and charging cable all work fine. Except that the powerpack does not notice the Pixel is connected, so does not start charging.

But I can fool it as follows:

Connect some other device - charging starts fine.
Unplug that device and (within about 10 seconds) plug in the Pixel instead - charging continues fine.
Apparently the only thing that doesn't work is for the powerpack and the phone to notice each other. Any ideas what's going on?

 

[B. Diddy]

Welcome to Android Central! Which powerbank? Some require you to turn them on before they start charging. That's the case with my Samsung powerbank.

Please register on this forum, which will allow you to engage in discussion more easily, as well as post images. https://forums.androidcentral.com/ask-question/409154-join-android-central-community.html