I will remember to take my laptop power cord with me. I will remember to take my laptop power cord with me. I will remember to take my laptop power cord with me.
Repeat 1000 times.
This would be less of a problem if I replaced the current batteries (about a 10 minute life). But even then a couple hours isn’t much when you are thinking 4-5 hours of online work.
Of course, a benefit of having no meaningful network access last night (our other machine is in use most of the evening by others) was that I got a whole bunch of other stuff done.