Cordless vacuum’s LED battery indicator shows full, but runtime is very short.

Safety first: Use only original Kärcher batteries.

• Recalibrate (if supported): Fully charge the battery, then run the vacuum continuously on normal mode until it shuts off. Fully recharge again. This can improve indicator accuracy on some models.
• Compare to spec: Measure actual runtime and compare to Kärcher’s stated runtime for your model and mode.
• Replace battery if needed: If runtime is significantly below spec after calibration, the battery pack has likely lost capacity and should be replaced.