Display shows "Lo" or a single red bar and the vacuum shuts off within seconds of starting.

Safety first: Use only the original Sencor charger.

• Fully charge: Place the vacuum on the charger until the battery indicator shows full (this may take several hours).
• Reduce load: Clean all filters and empty the dust bin to reduce motor load and voltage drop.
• Check charger: Ensure the charger LED indicates normal operation. If the battery never reaches full, the charger or battery may be faulty.
• Battery health: If the vacuum still runs only briefly after a full charge, the battery cells are likely worn out. Replace the battery pack with a genuine Sencor replacement.