The efficiency and longevity of an implantable electrotherapy device is greatly improved by utilizing a biocompatible coating material to selectively cover desired portions of the electrotherapy device andor the related leads. The secure messaging platform may include a token coupled to a mobile device, or a mobile device alone. A node memory stores a node value. The cavities may be supplied with cooling fluids from an internal cooling cavity through one or more interior metering orifices.