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mark.steitle(at)austin.ut Guest
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Posted: Thu Jan 26, 2006 6:50 am Post subject: Battery Charging Question - Fight or Switch? |
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Bob,
Following an earlier Aero-Electric discussion on battery chargers, I
purchased a Schumacher SC-1200A charger to use in maintaining the
Odyssey PC-680 batteries in my airplane. The charger has settings for
flooded-cell, deep-cycle, and AGM/Gel-cell batteries. I've been using
the AGM/Gel-cell setting. I read today in the document titled Charging
Odyssey Drycell Batteries (www.odysseybatteries.com/charging.htm) where
it states, "In general, do not use either the gel cell or maintenance
free setting, if provided on your charger. Choose the deep cycle
option, should there be one on your charger." So, now I'm confused as
to which to use. My PC-680 doesn't appear to have been harmed by
charging on the AGM/Gel-cell setting, but now I'm confused. Should I
switch to the deep-cycle setting, or continue as before?
Mark
Lancari ES
Austin, TX
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brian
![](images/avatars/28567319943bd489733e72.jpg)
Joined: 02 Jan 2006 Posts: 643 Location: Sacramento, California, USA
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Posted: Thu Jan 26, 2006 4:47 pm Post subject: Battery Charging Question - Fight or Switch? |
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Mark R Steitle wrote:
Quote: | Following an earlier Aero-Electric discussion on battery chargers, I
purchased a Schumacher SC-1200A charger to use in maintaining the
Odyssey PC-680 batteries in my airplane. The charger has settings for
flooded-cell, deep-cycle, and AGM/Gel-cell batteries. I've been using
the AGM/Gel-cell setting. I read today in the document titled Charging
Odyssey Drycell Batteries (www.odysseybatteries.com/charging.htm) where
it states, "In general, do not use either the gel cell or maintenance
free setting, if provided on your charger. Choose the deep cycle
option, should there be one on your charger." So, now I'm confused as
to which to use. My PC-680 doesn't appear to have been harmed by
charging on the AGM/Gel-cell setting, but now I'm confused. Should I
switch to the deep-cycle setting, or continue as before?
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The charging voltages for AGM and gel-cells are quite different. If the
manufacturer has put an AGM/gel setting it means that the manufacturer
does not understand the difference between AGM and gel batteries.
My guess is that the deep-cycle is probably closer as the charging
voltages that AGM batteries like are quite close to the charging
voltages needed for properly charging deep-cycle flooded-cell batteries.
Ballpark charging voltages (70F-80F, (21C-27C):
AGM/deep-cycle Gel-cell
Charge 14.3V 13.7V
Float 13.4V 13.4V
It is interesting to note that the charge and float voltages for
gel-cells are close enough together that you can actually get away with
one setting for charge and float with gel-cells. 13.6V would probably
work well for both charge and float.
--
Brian Lloyd 2243 Cattle Dr.
brian-yak at lloyd dot com Folsom, CA 95630
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
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_________________ Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery |
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mark.steitle(at)austin.ut Guest
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Posted: Fri Jan 27, 2006 6:24 am Post subject: Battery Charging Question - Fight or Switch? |
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Brian,
Thanks for your most excellent reply. Looks like I should start using
the deep-cycle setting from now on.
Mark S.
--
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