Abstract: A power and control system for micro-electronics is described, as for lightweight, battery-powered electrochromic (EC) eyewear. Preferably such system includes a primary, lithium-type cell and a secondary, sealed lead acid-type cell in a hybrid, power-sharing configuration capable of supplying the low-energy, high-current (pulse) drain requirements of microelectronics, e.g. a switchable EC lens. A switch-mode power supply controller manages the power-sharing load on the hybrid battery system such that the secondary cell is charged by the primary cell. The system is capable of meeting short-term pulse drain requirements of switching EC lenses from clear to fully darkened at an acceptably fast rate and long-term operating life requirements of approximately 1500 cycles.

Abstract: A power and control system for micro-electronics is described, as for lightweight, battery-powered electrochromic (EC) eyewear. Preferably such system includes a primary, lithium-type cell and a secondary, sealed lead acid-type cell in a hybrid, power-sharing configuration capable of supplying the low-energy, high-current (pulse) drain requirements of microelectronics, e.g. a switchable EC lens. A switch-mode power supply controller manages the power-sharing load on the hybrid battery system such that the secondary cell is charged by the primary cell. The system is capable of meeting short-term pulse drain requirements of switching EC lenses from clear to fully darkened at an acceptably fast rate and long-term operating life requirements of approximately 1500 cycles.