I have the S8, and If my speed 20100 had gotten through my.letterbox, I'd be using that quite happily.
With a decent lead, and Q3 on the speed, you'll power up nice quickly on the SPEED! Speed is one of few piwerbanks that has Q3
What's gonna happen about it not being put in my hand/letterbox? As it was only delivered by Amazon, what recourse do I/you have?