It is a standard but rather heavy lead-acid 12V battery. I have no clue how many times I can brew the coffee, because I am not that addicted to coffee that I drink it more than once on a long flight. And in most cases I forget it.
Interested in what the 12V battery power-pack looks like / consists of. Proprietor or home build?
Sure they must be 'dry' batteries, but 150W is a 'draw'. How many times can you 'brew' on a long flight.
That is great! Bit of a spillage risk but great nonetheless.
You don't use boiling water to make espresso. It is brewed at a temperature just below boiling temp. Too hot and the coffee will taste burned. To cold and the coffee will taste sour.
So far, the Handpresso works very well. Next thing I need is a stewardess making me the espresso :-) while I fly the plane.
Espresso requires pressure so water boils in enclosed volume at higher than air pressure. Data sheet for this is 9 bar iirc :) boiling point well over 100 C
Being a cappuccino drinker the next challenge is heating and frothing the milk:0
Caber:)
Impressive!
Do you get the water hot enough at 18k?
The boiling point will drop substantially, relative to sea level.
