I bought a Qi Infinity 35000mAh last year for my surface book: www.qi-infinity.com/products/35k-mah-surface-pro-charger I realize that's a huge battery but for taking on airplanes in my backpack it isn't that bad. The thing that worries me is it says it supports quick charge, which from what I have read has the potential to damage electronics not designed to quickcharge. Is that true? Would I be better off buying another powerbank that doesn't support quickcharge? It says the outputs of the USB is 5V,2.1A,9V/12V. This thing can charge my surface book, my wife's iPad and my daughters iPad while we are using them so it's pretty powerful.