Date: Wed, 20 Feb 2002 13:21:13 -0600 From: [EMAIL PROTECTED] Subject: Re: [LIB] Re: Lib batteries
On 20 Feb 2002 at 11:07, neil barnes wrote: > Date: Wed, 20 Feb 2002 18:59:19 > From: "neil barnes" <[EMAIL PROTECTED]> > Subject: Re: [LIB] Re: Lib batteries > > > >Date: Wed, 20 Feb 2002 10:35:34 -0600 > >From: [EMAIL PROTECTED] > >Subject: Re: [LIB] Re: Lib batteries > > > >On 20 Feb 2002 at 5:31, [EMAIL PROTECTED] wrote: > > > > > series while the high cap has 3 pairs of cells in series. Kind of odd, > >since > > > I thought that one should not put voltage sources in series. I will > >study > > > the wiring closer. > > > >In parallel. Its not recommended batteries are put in parallel. Actually > >that is a hold > >over from AC. Its difficult to put ac sources like transformers in parallel > >because > >they have to be very closely matched. With most dc sources its safe to do. > > Be cautious. The reason it's recommended that primary or secondary cells are > not usually connected in parallel is to prevent differences in internal > output impedance causing one battery becoming reverse charged. There's a > tendency for one to empty before the other, and this is not usually a good > thing[tm]. One other thing is unless the internal resistance of the battery is closely matched, in parallel, they'll charge at differant rates. So one will reach a full charge faster than the other and if charging is cut off one can be undercharged. In AA cells I've seen differances in resistances of over 5 ohms which is quite a bit in current. This matters more as the cells age an the internal resistance gets greater. > > If they've been wired in parallel in the battery, then Tosh have presumably > sorted this problem out - either improvements in the technology of the cell > or the technology of the charger. Of course, to the Lib charge circuit, the > battery has to look the same irrespective of capacity. > > _________________________________________________________________ > Send and receive Hotmail on your mobile device: http://mobile.msn.com > > > > > ************************************************************** > http://libretto.basiclink.com - Libretto mailing list > http://libretto.basiclink.com/archive - Archives > http://www.picante.com/~gtaylor/portable/faq.html - FAQ > -------TO UNSUBSCRIBE------- > Reply to any of the list messages. The reply mail should be > addressed to: [EMAIL PROTECTED] - Then replace any text > on the message's subject line: cmd:unsubscribe > --------TO UNSUBSCRIBE DIGEST------ > Do above but with this on subject line: cmd:unsubscribe digest > ************************************************************** > ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://libretto.basiclink.com/archive - Archives http://www.picante.com/~gtaylor/portable/faq.html - FAQ -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
