Dear all, my phone started to power down after using almost half a year. And l thought a power bank could be helpful when I was outside. After went through so many types and brands of this kind of product, I still have no idea to pick one. Especially when you almost make a decision, then you found some negative comments. So if you have experience in using this kind of product, please share with me. BTW, please not recommend Anker, my friend had one and he said that Anker doesn’t support Samsung Tab… tks.