Now available in its third edition, XP Power’s 144-page technical guide for power supply specifiers covers all the major aspects of power supply integration and adds several sections covering topics such as the characteristics of battery power sources, high peak load capability, powering LEDs, and high voltage safety testing. Also, approvals and standards information is up to date the most current legislation. Other features include revisions to the EMC considerations for defense and avionics applications section and expansions of the energy efficiency chapters to include an explanation of efficiency specifications relating to both external and component power supplies. The Power Supply Technical Guide is available on the company’s website free of charge. XP POWER, Sunnyvale CA. (408) 732-7777.