How long do cordless vacuum batteries really last?

Manufacturer runtime claims (50–70 minutes) almost always reflect the lowest eco mode with a non-motorized tool. Verified-purchase reviewers and r/VacuumCleaners threads repeatedly note real runtime on carpet or boost mode drops sharply, sometimes to 13–20 minutes. Models with a removable/swap-in battery, like the Bissell PowerClean line, let you keep cleaning by carrying a spare.