Battery icon flashes and vacuum stops; no other error code shown

Safety first: Allow the battery to cool if it feels hot before charging.

• Recharge battery: Remove the battery and place it on a compatible Hilti charger until fully charged.
• Warm up cold batteries: If working in low temperatures, bring the battery indoors and allow it to reach room temperature before use.
• Reduce load: Use a lower power setting or a larger nozzle to reduce suction load, which can help prevent voltage sag on older batteries.
• Evaluate battery health: If runtime is very short even after full charge, the battery cells may be worn. Replace the battery pack.