Best Power Bank
I am looking for the best power bank to use as an emergency or if I lose power in my home. When I lose house power, I can be out for a few hours to a few days. So, I am looking for something that will charge my iphones, ipads, Kindle Fires, etc.. and get me through the power outage. Again, I would need a power bank that supports a wide variety of devices as well as one that can last for a few days on a full battery.
What is the best power bank to use for emergenies such as a power outage?
iPhone 6s Plus, iOS 10.2.1