Vacuum runs for only a few minutes on a full charge before shutting off, with no specific error code.

Safety: Do not open the battery pack; it contains high-energy Li-ion cells.

• 1. Fully charge battery: Charge the battery until the charger indicates full. Leave it on the charger for an additional 30 minutes to ensure cell balancing.
• 2. Measure runtime: Run the vacuum continuously on standard mode and time how long it operates until shutoff. Compare with the runtime specified in the Siemens manual.
• 3. Repeat test: Perform a second full charge and discharge cycle. If runtime remains significantly below specification, the battery is degraded.
• 4. Inspect for swelling: Remove the battery and check for bulging or deformation. If present, discontinue use immediately.
• 5. Replace battery pack: Purchase a genuine Siemens replacement battery pack compatible with your model. Dispose of the old pack at a proper battery recycling facility.

Using a degraded battery can cause unexpected shutdowns and may stress the electronics; replacement restores normal runtime.