Huh! Mine doesn’t have that in the manual. That’s really good to know though as that might have been what damaged the other ones I had. I will charge mine in the pool from now on. Also mine will also sometimes randomly throw the default code of blinking red and blue. I can either reset it and it’s fine or just leave it and after 20 minutes it resets itself.Actually, my bad. It was also in my manual, as a "stickie" over some previous text.