“The battery string trimmer I have is too under powered.”
Sometimes I have to go a little slower to edge the fast growing St. Augustine but it is worth it to not fuss with the cord.
But I am running 18v and 0.065. I want to upgrade but the dang thing won’t die. 8 years of weekly use and no battery degradation that I can notice.
Kobalt has a 80v 0.080 model that uses the same battery as my mower! It would be quick but the battery is heavy.
You are the FR motor man (or one of the top 5) so I give up today and have a nice one is sunny Florida. By FR motor man I mean dinosaur petro and electric and EV and so on.