Extender is a consumer product, it is not intended to use be used for in-patient health care or in hazardous environments.
Extender is powered by a Lithium-Polymer battery that is rated for operation in <45C environments. It is not user replaceable, please contact support if you suspect you have a faulty battery.
WARNING: Do not open the enclosure. Doing so will void the warranty and can damage the headset.
Extender features a 2.5kV isolation barrier. Safety precautions have been taken to ensure this isolation barrier but any modification to the case will mitigate the safety.