Been searching the forums trying to figure the best portable battery and bag.
I ordered both the Carhartt and the neewer gopro case to see which one is a better fit. The neewer is really better. Closes easily with the lid on and the power pack inside and sits very firmly and safely inside.
I have used the foam from the XTpower package to cut protection for the case and the result is perfect! The whole deal is really durable and I feel safe about my gear.
I use a similar setup but in a shoulder bag normally used for photography I think. The shoulder bag is sort of a softcase on the inside, so the DT can go in without additional protection. Then I have a small rectangular case where the battery fits in + the rx100 camera + the gorillapod. The headphone goes on top and the tripod underneath the lid of the back to keep it secure. This is what I take with me: