LED battery indicator does not match actual runtime (e.g., shows full but dies quickly)

Safety first: Ensure the battery and charger are in good condition before performing calibration cycles.

Step-by-step checks:

• 1. Perform a full discharge: Fully charge the battery, then use the vacuum continuously in normal mode until it shuts off by itself.
• 2. Fully recharge without interruption: Immediately place the battery on the charger and charge it to 100% without removing it mid-charge.
• 3. Repeat once more: A second full cycle can help the internal gauge recalibrate.

When to stop: If the indicator remains inaccurate and runtime is short, the battery is likely degraded and should be replaced.