Blog Post
I can confirm that the water and debri warning has something to do with a powerbank going empty but i dont have V62, i have V60 and i have this message, so its not related to that. I use external Powerbank all the time with the quest 3, have it in my pocket. For me its much better than headtrap with build in battery because those use often cheaper powerbanks with less capacity. Its just better to have a 20.000 mAh Powerbank, i have a lot of them. There is a reason Apple decided for an external powerbank and no internal power.