Safety first: Allow the battery to cool before charging or testing.

Step 1 – Service brushroll and filters: Clean the brushroll, remove hair, and clean all filters to reduce load.
Step 2 – Compare modes: Time the runtime on low vs high power. If both are significantly below spec, the battery is likely worn.
Step 3 – Replace battery: Install a new genuine Dirt Devil battery pack.
Step 4 – Usage habits: Avoid always using turbo mode for entire cleaning sessions to maximize runtime.

Vacuum runtime is much shorter than specified, even after full charge

Possible Causes