re: Recommend Bluetooth Outdoor Speaker

Not sure how big you're looking to go but will throw out the ECOXGEAR Boulder+ as a larger option.

I've had mine for years. Use it in the boat, throw it in the lake let it float, use it for parties, etc. All I can say is it's impressive.
Longest I used the battery was at a sand bar. Max volume for 7-8 hours, only brought it down to around 25%.
I throw it in the lake or river while swimming so we can skip songs, adjust volume, etc.
Has wheels and a handle but not terrible to carry when needed. (It is slightly heavy though; I assume due to battery size)

After about 2 or so years of abuse, a seal failed while I had it in the water and it died.
They warrantied it without recipe, or asking me to ship it to them, just sent me a brand new one.
(I actually asked for a repair after all the abuse I put it thru I had no issue with paying to fix it or just buying another)