Apparatus and method for generating and storing energy in a portable energy storage device and using the stored energy to extend internal battery life

摘要

A portable energy storage device that can be brought to a desired operating condition (such as temperature) using an external power source to save the power in internal power cell and, when the external power source is disconnected from device to make it portable, the internal power cell of the device automatically provides output power to the load that is regulated by a pulse time modulation control circuit that senses the desired operating condition and provides power pulses to the load sufficient only to maintain the desired operating condition thus extending the life of the internal power cell in the portable device.