Safety first: Remove the battery before clearing blockages.

Clean filters and hose: Ensure all filters are clean and the hose/nozzle are free of obstructions.
Use appropriate power setting: Use lower power modes when full suction is not required.
Test with another battery: Compare runtime with a newer or higher-capacity Hilti battery.
Service if needed: If runtime is short even with a good battery and clean filters, the motor may be inefficient or failing and should be inspected.

Battery drains unusually fast when using the vacuum

Possible Causes