Cordless vacuum’s battery indicator LEDs are inaccurate (e.g., shows full but shuts off quickly).

Safety first: Monitor the vacuum during calibration cycles to avoid overheating.

• Perform calibration cycles: Fully charge the battery until the charger indicates 100%. Then run the vacuum in normal mode until it shuts off automatically. Repeat this full charge/discharge cycle 2–3 times.
• Avoid constant top-ups: When possible, allow the battery to discharge to around 20–30% before recharging to maintain gauge accuracy.
• Evaluate battery health: If runtime remains short despite calibration, the battery itself may be worn and require replacement.

When to call a technician: If the gauge remains erratic with a new battery, the main PCB may have a sensing fault and should be checked by ETA service.