A fluid cooling apparatus includes a first cooling portion have a first series of cooling elements with first cooling surfaces. The enhanced power transfer is achieved with multiple coils that are longitudinally aligned and physical and electrical parallel to form the secondary loop of a transcutaneous energy transfer system instead of a single coil. The polymers are readily converted to N-halamine structures on exposure to a halogen source such as commercially available chlorine bleach. Aggregated time also includes a relative time value which in part accumulates using a session clock whenever the device is powered-up. Various queries to test user integrity include memory peeks, confirmation of location of functions in memory, memory hashing, profiling of threads operating on the user machine, and combinations thereof.