I have been vaping for 2 months. with 3 apollo extreme 280mah batteries. each battery originally lasted16 hours. after the first month each battery now lasts only 10 hours. charger has been replaced. did not solve problem. apollo has not answered my questions as to why suddenly my batteries are lasting 30% less. carts also lasted 16 hours, now lasting only 12 hours, 2 hours longer than batteries. any ideas as to why?