I usually get all day with mine Bjay, although I charged it in the car once and got less than a day.
Re settings, I think there are two schools of users. Some use 3 and make it purr like a kitten and go really slow. The target response is smoother but if you are going slow, it is noticeable even if not distinctly loud.
Others like to use 5 as the response is more noticeable but as you say the warble is annoying for extended periods. The concern here is, does a small target response get masked by the background warble.
Personally, I switch between the two depending on my mood, but if I find a patch I work it using both settings and have picked up small nuggets both ways. I have a slight preference to running it higher as I don't think my ears are as sensitive to the subtle tone changes some of my detecting friends seem to have.
4 is half way in between.
Re settings, I think there are two schools of users. Some use 3 and make it purr like a kitten and go really slow. The target response is smoother but if you are going slow, it is noticeable even if not distinctly loud.
Others like to use 5 as the response is more noticeable but as you say the warble is annoying for extended periods. The concern here is, does a small target response get masked by the background warble.
Personally, I switch between the two depending on my mood, but if I find a patch I work it using both settings and have picked up small nuggets both ways. I have a slight preference to running it higher as I don't think my ears are as sensitive to the subtle tone changes some of my detecting friends seem to have.
4 is half way in between.