Please note that strong magnets are built-in the VARTA product. In some cases, magnets and electromagnetic fields can interfere with (electronic) medical devices e.g. implanted pacemakers and defibrillators. Please inform yourself about potential impacts before use. To avoid possible interactions with medical devices, keep the VARTA product at a safe distance from the medical device. For specific guidelines and risk assessment, get in contact with your health care provider or your medical device manufacturer.