ROCKSTER AIR: Are replacement batteries available? Teufel Support December 07, 2023 14:53 Updated Replacement batteries for the Teufel ROCKSTER AIR are available in the webshop → Replacement battery Related articles ROCKSTER / ROCKSTER AIR: The battery does not charge and/or discharges very quickly. Is this a defect? ROCKSTER AIR: Device not usable although switched on. The LEDs light up ROCKSTER: Can the device also be operated from a car socket (12 V)? ROCKSTER AIR: Is there a protective cover/carrying case? My product is apparently defective