Boeing aircraft provides 110volts but the cycles are 400, not the standard 60. My question is can charging a cellphone or camera battery at the higher cycle cause harm to the battery? 73, Ed k3env -- View this message in context: http://elecraft.365791.n2.nabble.com/Battery-Charging-tp7564773.html Sent from the Elecraft mailing list archive at Nabble.com.