Hello everyone , I need your help to choose which power bank best suits my needs, I did some research and found some power banks by the name of Xiaomi which are suppose to be a big deal when it comes to power banks. I also found a local store that sells these Xiaomi power banks called Gerardo. The have 4 power banks to choose from but I'm not too sure which one I should get. I want it be able to charge my iPhone 6, 2-3 times from one charge. Any help would be really appreciated!