I think I'm being really thick but I have one of these and I cannot work it out. Obviously I know you attach a power bank etc I guess what I'm confused about is how is it different to just attaching your phone to your power bank and putting it in a normal bag? I'm not tech savvy at all so I may have missed the point/be overthinking how 'smart' it is. Is it just so you can charge the phone in the bag whilst also carrying the phone? But my cable isnt long enough so maybe it isnt that? Can anyone help explain it, I feel 100 years old