Small loaders or big powerbanks?

If you are only dying at the end of the day, just get a small battery, but consider what other opportunities you have to charge during the day: a quick recharge in the car? on your desk?

Most days I can manage loading in the car, at my desk, but in my busy days I trust my 20000. A 10000 is not enough, and the 20000 rarely runs out.