First world problem. I usually use an AC power vacuum cleaner. I can usually clean a few rooms, wall to wall carpeted before getting a bit tired and the canister needs to be emptied.

I have a DC one as well, same company. I'm not sure what they were thinking. Or perhaps I'm not really the target demographic. But I can barely clean a 10x10' carpeted area (5 minutes?) before I need to empty the canister. The battery I think will last about 30-45min. Why would they design it such that the canister needs to be emptied every 5 minutes? Size it so that I can clean at least half the battery run time; empty 2x at most. To empty it 6x in one session seems under designed to me. Am I missing something?

It's not like my floor is that dirty. I vacuum at least once a week.

It might be related to the design, maybe it’s a more efficient suction with a smaller canister?

I think a larger canister would be more efficient, but it's bulkier.

Maybe the cannister size is in corealation to the size and efficency of the filter.. When filter is full it creates a power drag on the DC power supply resulting in faster power depletion and possible motor overheating. .................................. drill sgt.