hello i'm trying to use yi 4k with external power bank, latest firmware 1.6.10, without battery. i tried this one https://www.amazon.it/gp/B01L90C9HQ but after around 1 hour the recording stops by itself. so i tried another this one http://www.belkin.com/us/p/P-F8M979/ and again same issue recording stops after around 1 hour and half. the cam gets pretty hot so i'm thinking about a heat issue. what else can i try to find the problem?
thnx