I'm not the least bit surprised.

In my case it never made any sense. My personal electronics stuff runs on power cords either in the house, office or car. A power cord is in my day pack; a power cord is in my vehicle and both are smaller than power banks. The cord is necessary for transferring data so I need to have it regardless of an extra portable power source. If I am truly far enough away from a power source, its because I want to be (i.e. camping) and the electronics are turned OFF.

I have an Android phone and until my recent upgrade I always had access to replacement/spare batteries that were a LOT EASIER to carry around than a power bank. I always viewed power banks as Steve Jobs's dead weight crutch since Apple users couldn't access their batteries in the sealed case. I see people carrying around power banks bigger than their phones - to me that is just ludicrous.

I must admit I have a small solar power bank with a single 18650 Li-Ion that I tried out but in the end I simply never used it (It charges out at only the standard USB rate of 0.5A which is way below the requirements of my phone let alone my computer. I also have a battery jump starter that can be used as to charge electronics but it to charges electronics at < 1.0A and isn't pin compatible with my laptop. Admittedly, there are new power banks that out perform what I have but that's just more money to spend for something I probably don't NEED.