My laptop charging circuit. Will everything work or is there an error in judgment?

Question

Electronics

I buy this
battery
I connect it
Charging
And I charge my laptop.
Will it work? And will it work well?

Answer 1

Will work. You get a kind of UPS. Enough for a couple of hours
Better take a car battery, it will work several times longer

Answer 2

It should work, but you also need to charge the external battery with something.
Depending on the working conditions, +1 for a car battery + the simplest charging for it.
Better describe your problem - maybe there is a more rational solution.