Secondary electrical power supply
Secondary power supply for use with handheld illumination device
Secondary source of energy system for powering communications ha
Security system for alternative energy supplies
Selective connection of power supplies
Self-diagnostic redundant modular power supply
Self-programmable battery load/bias for memory expansion module
Semiconductor integrated circuit
Shunt circuit for reducing audible noise at low loading conditio
Shunt connected superconducting energy management system...
Shunt connected superconducting energy stabilizing system
Shunt connected superconducting energy stabilizing system
Shutter control apparatus
Simultaneous power supply source
Sine wave generation circuit and uninterruptible power...
Single chip solution for solar-based systems
Small electronic device capable of switching batteries by releas
Smart power switch for broadband communications network
Smart power switch for broadband communications network
Snubber circuit for use in an uninterruptible power supply