---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 09/13/24: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:38 AM - Re: Re: Small battery choice (Bob Verwey) 2. 06:06 AM - Re: Re: Small battery choice (Kelly McMullen) 3. 12:55 PM - Re: Re: Small battery choice (Peter Pengilly) 4. 02:03 PM - Re: Re: Small battery choice (Charlie England) ________________________________ Message 1 _____________________________________ Time: 12:38:18 AM PST US From: Bob Verwey Subject: Re: AeroElectric-List: Re: Small battery choice I think the obsession with small batteries creates much more aggravation than benefits. I can understand the importance of weight saving in small aircraft. Your stock Concorde or equivalent typically lasts many years despite abuse. On Fri, 13 Sept 2024 at 07:36, AdventureD wrote: > dobrien@microfoundations.com> > > I should mention that my Odyssey 680s had 300 and 400 hours on them when > they failed, which was probably like 150 and 200 starts. Is that about how > long they last? Should they last longer? Did I get reasonable life out of > them? > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=513823#513823 > > -- Best Regards, Bob Verwey 082 331 2727 ________________________________ Message 2 _____________________________________ Time: 06:06:48 AM PST US Subject: Re: AeroElectric-List: Re: Small battery choice From: Kelly McMullen Over the 8 years I have had my RV-10 I hav e used 2 Odyssey 925's, and am still on the 2nd one. On 9/13/2024 12:37 AM, Bob Verwey wrote: > I think the obsession with small batteries creates much more > aggravation than benefits. I can understand theimportance of weight > saving in small aircraft. > Your stock Concorde or equivalent typically lasts many years despite > abuse. > > > On Fri, 13 Sept 2024 at 07:36, AdventureD > wrote: > > > > I should mention that my Odyssey 680s had 300 and 400 hours on > them when they failed, which was probably like 150 and 200 > starts. Is that about how long they last? Should they last > longer? Did I get reasonable life out of them? > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=513823#513823 > > ________________________________ Message 3 _____________________________________ Time: 12:55:09 PM PST US From: Peter Pengilly Subject: Re: AeroElectric-List: Re: Small battery choice Odyssey batteries seem to take a fair amount of abuse if they are used regularly. I had an aerobatic aircraft that had a PC-680 and an SD-8 and flew many short trips. The battery can hardly ever have been fully charged. Didn't seem to matter. If we left it over the winter with little use, even if it was charged occasionally, it would become unhappy (run out of charge quickly) soon after we started flying again. If it was taken out over the winter and put on a tender it lasted for a few years. Sorry, can't remember the specifics. On Fri, 13 Sept 2024, 14:14 Kelly McMullen, wrote: > Over the 8 years I have had my RV-10 I hav e used 2 Odyssey 925's, and am > still on the 2nd one. > On 9/13/2024 12:37 AM, Bob Verwey wrote: > > I think the obsession with small batteries creates much more aggravation > than benefits. I can understand the importance of weight saving in small > aircraft. > Your stock Concorde or equivalent typically lasts many years despite > abuse. > > > On Fri, 13 Sept 2024 at 07:36, AdventureD > wrote: > >> dobrien@microfoundations.com> >> >> I should mention that my Odyssey 680s had 300 and 400 hours on them when >> they failed, which was probably like 150 and 200 starts. Is that about how >> long they last? Should they last longer? Did I get reasonable life out of >> them? >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=513823#513823 >> >> >> >> ________________________________ Message 4 _____________________________________ Time: 02:03:28 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Re: Small battery choice Unless the start was a really difficult one, it pulls very little total energy from the battery, and it will get topped up fairly quickly by a 40-60 amp alternator. RE Odyssey, I've been using AGMs in aircraft for over 20 years, and I've never bought an Odyssey. I've always shopped ebay/Amazon for the best price on 20-22AH AGMs at the moment, and with a single undiscovered shipping damaged copy, I've gotten 3-5 years service from them. I never use maintainers, but if the plane has been sitting for several *months*, I might 'top it up' with a short charge session (though I've also found that it's rarely if ever necessary). Only time I've had shorter life was when I've accidentally abused one by leaving the Master on. If there are no 'vampire' loads sucking on the battery while the plane is sitting, an AGM is usually at 80% charge after sitting for 6-12 months, according to Odyssey's own technical docs (which remain excellent, whether their batteries are still up to snuff or not). The only caution I'd offer about the generic AGMs is to try to find the battery's internal impedance in the specs. If it's above around 10 milliohms, it's probably not the best choice for a starting battery; it was probably designed for UPS duty rather than a vehicle. Having said that, I've found that the 20-22AH versions, as long as they have fairly substantial looking posts, they'll work just fine for starting a Lyc. FWIW, YMMV, etc Charlie Virus-free.www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Fri, Sep 13, 2024 at 2:58=AFPM Peter Pengilly wrote: > Odyssey batteries seem to take a fair amount of abuse if they are used > regularly. I had an aerobatic aircraft that had a PC-680 and an SD-8 and > flew many short trips. The battery can hardly ever have been fully charge d. > Didn't seem to matter. If we left it over the winter with little use, eve n > if it was charged occasionally, it would become unhappy (run out of charg e > quickly) soon after we started flying again. If it was taken out over the > winter and put on a tender it lasted for a few years. Sorry, can't rememb er > the specifics. > > On Fri, 13 Sept 2024, 14:14 Kelly McMullen, wrote: > >> Over the 8 years I have had my RV-10 I hav e used 2 Odyssey 925's, and a m >> still on the 2nd one. >> On 9/13/2024 12:37 AM, Bob Verwey wrote: >> >> I think the obsession with small batteries creates much more aggravation >> than benefits. I can understand the importance of weight saving in small >> aircraft. >> Your stock Concorde or equivalent typically lasts many years despite >> abuse. >> >> >> On Fri, 13 Sept 2024 at 07:36, AdventureD >> wrote: >> >>> dobrien@microfoundations.com> >>> >>> I should mention that my Odyssey 680s had 300 and 400 hours on them whe n >>> they failed, which was probably like 150 and 200 starts. Is that about how >>> long they last? Should they last longer? Did I get reasonable life out of >>> them? >>> >>> >>> >>> >>> Read this topic online here: >>> >>> http://forums.matronics.com/viewtopic.php?p=513823#513823 >>> >>> >>> >>> ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.