Are you asking about a BT speaker only?
I use 2 different ones (depending on the situation).
I have "Beats Pill" for the backpack/ultra portability situations. Not cheap, sound quality is great, battery life is ok.
For stationary situations (camping, working around the house/barn/yard) I have a large system called the "Job Rocker". This sucker is heavy (huge battery), but cranks! Sound quality is good, it is cranking loud, has a built in AM/FM tuner, battery lasts VERY long (I've gotten 4-5 day camping trips out of it on one charge). On op of it being battery powered, it is a 110v distribution outlet when plugged in! It is a great one stop shop unit for all kinds of uses, its just not that easy to carry around....so use accordingly.
Google either of those options and you'll find all the info you need.
Good luck.