That newspaper editors do not always consist of 'petrol heads' is again proven in the Volkskrant. There an article is dedicated to jumpstarters.
We'll just warn you. In case your neighbor, who knows how tech-savvy you are and how well-organized you are, is having trouble starting his recent car in the morning.
A jump battery over modern electronics recently proved to be good for 4000 electronics damage to a Mercedes S class from 2011. Something with peak voltages. The destructive influence of this can be limited by switching on as many power consumers as possible when starting.
But that is also something that you need to know