You backup battery might be missing one important feature, solar! Image not having to plug in your power bank to charge it. Instead just leaving it out on a window sill to absorb some rays to replenish your phone battery. Nice idea and we will experiment to see what this is capable. The power bank also features Qualcomm Quick Charge 3.0 and a 16,000 mAh battery to keep you on the go for a long time.
You can grab one from Amazon, here.