Post by thread:[EE]: Help with battery choice

I need a battery that can provide 3 mA at a minimum of 6V for at least 50 hours. Coin cells are rated much higher than this, but they are for a typical current of .2 mA. The datasheets don't even go above 2 mA for coin batteries, so I am assuming they wouldn't work too well. A 9V battery is more than enough, but I would like to get something smaller if possible. And I don't want anything more expensive than a 9V battery. It is a custom job, so if it is some exotic hard-to-find battery, that is fine. Any ideas? Thanks! Alex -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> I need a battery that can provide 3 mA at a minimum of 6V for at least > 50 hours. Energizer A544 perhaps? -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> I need a battery that can provide 3 mA at a minimum of 6V for at least > 50 hours. Coin cells are rated much higher than this, but they are for > a typical current of .2 mA. The datasheets don't even go above 2 mA for > coin batteries, so I am assuming they wouldn't work too well. A 9V > battery is more than enough, but I would like to get something smaller > if possible. And I don't want anything more expensive than a 9V > battery. It is a custom job, so if it is some exotic hard-to-find > battery, that is fine. > > Any ideas? Lithium cells? Two in series will get you 6V, and they have huge power compared to their size. Cost might be a factor, not sure how cheap you can get them. TTYL -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> > > I need a battery that can provide 3 mA at a minimum of 6V > for at least > > 50 hours. > > Energizer A544 perhaps? > That's rated at 30K. 150 mA-H with a typical drain of .16 mA. :-( Alex -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads