Mailing List lml@lancaironline.net Message #40534
From: colyncase on earthlink <colyncase@earthlink.net>
Sender: <marv@lancaironline.net>
Subject: re: dry batteries - findings
Date: Wed, 07 Mar 2007 16:33:56 -0500
To: <lml@lancaironline.net>
why my $400 battery is toast
    - std lead/acid batteries, even agm ones, will sulfate if stored without being on a charger.  Mine sat for a couple years.   Most people know about this.
    - charge life of a std battery is 90 days
    - shelf life of a std battery is 1.5 years
 
bringing back a sulfated battery
     - most effective is a pulse desulfator available here: www.geocities.com/powertugs
until 3/24.   There's an article there that tells all about why it works.
    - next best that I can tell is battery Minder + available here:
it has the high freq desulfator component.  I'm not sure if it does pulsing.
    - battery tender or power tender has a trickle charge cycle that will keep your battery from sulfating but I'm not clear it's much help if you've already committed the deed.
 
but why bother?
 
    - Odyssey batteries are also lead acid batteries but are electrolyte starved version of AGM.    This apparently makes them resist sulfation.   They also advertise up to 500 deep cycle life.
    - charge life of an Odyssey is on order 2 years
     - lots of happy lancair drivers out there with Odyssey's.   No complaints came back from my survey.
    - caveat: Odyssey measures Ah life by a 10 hour test.  vs. I think Concorde uses a 1 hour test.
    - Odyssey battery technical information is available here: http://www.odysseyfactory.com/ and will lead you to the retail site.
    - It looks like two pc625's will fit in the standard IVP battery box.
 
so far I can't come up with a reason for using an aircraft battery.  It seems to be deficient in a number of ways.
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