Safety first: Do not continue using a battery that becomes excessively hot or swollen.

Confirm full charge: Charge the battery until the charger indicates full. Then immediately test run time on low power.
Compare modes: Check run time on low vs high. Very short run time on all modes indicates battery wear.
Reduce load: Ensure filters and airflow paths are clean to minimize current draw.
Replace battery: If run time remains poor, replace the battery pack with a genuine Insignia replacement.

Vacuum run time is very short (only a few minutes) even after a full charge.

Possible Causes