The vacuum shuts down under moderate load, B3 is displayed, and the battery indicator may still show charge remaining.

Safety first: Turn OFF the vacuum and remove the battery.

• Check battery age: If the battery is older than 2–3 years or has been cycled heavily, it may be at end of life.
• Fully charge and retest: Charge the battery completely and test runtime in normal mode. If the vacuum still shuts down quickly with B3, the battery is worn.
• Replace the battery: Purchase a genuine Electrolux replacement battery pack. Avoid third-party packs that may not meet safety and performance standards.
• Battery care tips: To extend the life of the new battery, avoid storing it fully discharged and keep it in a cool, dry place.