Abstract: A system for powering at least one of electronic devices or a battery includes a pneumatic supply source and an accumulator for storing a collected amount of the pneumatic supply. A pneumatically powered generator is connected to the accumulator for generating power upon receipt of the pneumatic supply. The generator is further connected to at least one electronic device and a battery. A microprocessor controls a storage amount of pneumatic supply within the accumulator, determines an output of the pneumatic supply to the generator, and applies an electrical output of the generator to at least one electronic device, a battery, or both an electronic device and a battery. The pneumatically powered generator is an electromagnetic generator having a rotor cavity separated by a wall of the generator housing from a stator and related magnetic disc.