An isolated DC/DC power adaptor designed to power your Toughbook. The adaptor incorporates the highest degree of circuit protection for your Toughbook and the adaptor itself. The rugged design of this adaptor make sit ideally suited for use in harsh conditions. Efficient power conversion circuits with extensive protection circuitry provide reliable and continuous power in the most demanding environments. Special input voltage filtering is in place for input voltage ranges of 72-110 volts of DC power. The adaptor incorporates special input filtering that is designed for this highly unregulated power source.