Permanent Power for Wireless Sensors Wireless sensors are
becoming increasingly integrated and miniaturized. One obstacle
facing sensor designers is the lack of size and profile
improvement in batteries and other energy storage devices that
maintain sufficient capacity to deliver the necessary power and
energy. This paper discusses recent advances in thin-film
battery technology that are providing new means for wireless
sensor designers to power their devices. It introduces the new
EnerChip thin-film battery from Cymbet, which can be reflow-
soldered directly to the sensor electronics circuit card.
EnerChip batteries can be recharged many thousands of times,
making them ideal for wireless sensor applications.