The battery icon shows full, but runtime is only a few minutes before shutdown.

Safety: Handle the battery carefully; do not puncture or expose to heat.

• Verify charge cycle: Fully charge the battery until the charger indicates completion. Then run the vacuum continuously on standard mode and time the runtime.
• Compare to specification: Check the user manual for expected runtime. If actual runtime is less than 50% of the specification, the battery is likely worn.
• Try another battery: If a second Nilfisk battery provides normal runtime, replace the original pack.
• Storage habits: Avoid storing the battery fully discharged or in hot environments to prevent further degradation.
• Replace when needed: Once capacity is significantly reduced, the only reliable fix is to replace the battery pack.