On Tue, 11 May 2021 15:13:23 +0100, Commander Kinsey wrote:

https://www.ebay.co.uk/itm/353441460780

1200W cordless vacuum cleaner? Running off what looks like 2 18650 Li
Ion batteries. So since those are about 4V each, that's 150 amps from
one battery. I'm not so sure that's going to work....

That is probably the instantaneous power, lasting 5 secs. My little power
pack will start a car engine.