Kind of reminds me of the old 65w battery from the lights on the power button.

Haven't bought a powerbank in 5 years so can't comment on size, though I will say that 20W charging is... fine. I'll also say that I'm not overly impressed this only has 1 fast charging port, as on a battery of this capacity I'd at least want to semi fast charge 2 phones. Say, myself and a family member / SO / friend.

On the other hand, being a 3 series I don't think this will be particularly expensive. And if this is all you need from a powerbank I can see people getting this, especially considering they're a name brand and I've got no doubt it'll be safer than the no name things we see all over Amazon.

Also I think the iPhone users this is aimed at would want their Lightning input back.