I have had the Anker PowerCore+ 26800 power bank for almost 3 years, and have been happy with it. The only feature I have been missing was a lack of pass-through charging. Pass-through charging is useful when one wants to charge their device of choice (or many) and the power bank at same time. You would only need to carry one wall charger, and would need only one socket. The overall charging power will be, of course, more limited compared to several power adapters. But, for leaving everything to charge over the night it doesn’t matter much. Another case, where pass-through charging is useful, is while using a solar panel as the only power source. The power bank will act as a buffer, and all connected devices will be charging continuously, no matter if a cloud covers the sun. The time has come I was unfortunate and left my backpack on the beach too close to the ocean, while swimming. A high wave has decently washed over it, and a little bit of water came inside. My phone and power bank was the only electronics in the backpack. While my water-proof phone was just fine, the power bank wasn’t. Some …