The Universal Duplexer is powered by a single, user-replaceable, made-in-the-USA, CR123A lithium cell. We presently power with either an Energizer(NYSE:ENR, St. Louis MO)-brand cell (EL123AP) or a Panasonic-brand cell. The design of the Universal Duplexer is optimized for battery efficiency.  First, CMOS switching technology was leveraged to ensure that the idle-mode current draw is less Read More →