Hi Sean, You could find further information about batteries at panasonic web site: http://www.panasonic.com/industrial_oem/battery/battery_oem/batteries_oem_home.htm I hope you find exactly what you want. good luck, Eduardo. "Sean H. Breheny" em 18/11/2000 23:01:15 Favor responder para pic microcontroller discussion list Para: PICLIST@MITVMA.MIT.EDU cc: (bcc: EDUARDO LOPES DE SOUZA JUNIOR ELOPES/Embratel) Assunto: [EE]: Small batteries Hi all, Two quick battery questions: What type of battery would you recommend for a situation where you need about 9V, 20mA, for about one minute at a time (followed by about 30 minutes of off time), repeated several times? The battery must be as small and light as possible (this is for a model rocket altimeter). Are there coin cells capable of this current level? If so, several could be stacked to get 9V. Secondly, I remember small (smaller than AA size) 12V batteries being discussed here some time ago, but I can't find a supplier or the name of the type of battery. I think they might be used in wireless controls (such as car door lock transmitters). Thanks, Sean -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads