A:Answer It depends on what surface you are vaccuming. If you vacuum carpet or a rug that has a deeper pile, you won't get as much battery time as if you're doing a hard surface floor. I haven't timed mine, but I'd guess on the maximum suction I probably get 15-20 minutes, maybe 25 when I'm doing my hardwood floor. On carpet, it takes more energy to run the motor so it won't last quite as long.