Should I get a portable speaker for the dacha or just listen from my phone?

I'd still recommend getting a portable speaker, especially if you spend a lot of time at the dacha. After 28 years of work, I've figured out that small things really affect your comfort. With a weak phone speaker, music sounds thin and you get tired of it quick, plus your phone battery drains faster if you're constantly blasting the volume. A portable speaker holds a charge for 8-12 hours depending on the model, and the sound is way better.

Pick something mid-range, like a JBL Go or Anker Soundcore Mini - those are solid things that don't need special care. The main thing is it should have at least IPX5 water resistance, because it's always damp at the dacha and there can be splashes. For example, I take a speaker with me when I go fishing in winter, and it's never let me down, even though the conditions there are rougher than at the dacha.

If your budget's really tight - you can start with a cheap option for like 500-1000 rubles, then you'll figure out if you actually need this thing. But usually after their first summer with a speaker, people can't imagine the dacha without one. That's my experience, anyway.