Hi, I just want to ask a question. It probably does not matter much with fishing. Which brand of power bank do you use when you go fishing or traveling? Last month, I went on a hike with my friends, to my disappointment, my phone dead in the half way. I couldn't use it take pictures any more. So I just want to buy a external battery charger. How about your power bank? Do you have some suggestion or recommendation? Many thanks!