The vacuum charges only intermittently, or sometimes stops charging before it is full.

Safety first: Unplug the charger before inspection.

• Check wall outlet and plug: Ensure the charger is fully inserted into the outlet and not loose.
• Inspect cable: Look for kinks, cuts, or frayed insulation. Replace the charger if damaged.
• Reseat battery: Remove and reinstall the battery to ensure a solid connection.
• Monitor charging: Observe the LEDs during charging. If they turn off prematurely and the battery is not warm, suspect a charger or battery fault.
• Replace suspect component: Try a new charger first; if the issue persists, replace the battery pack.