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Old 05-31-2019, 09:06 PM
  #4  
Wildflyer
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Join Date: Sep 2009
Location: Lacey WA, 1 mile E of Mushroom Corner
Posts: 2,000
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Many of my friends use a separate full size car battery as their charging power. I don't think my best friend puts his charging battery on a charger more than once a month.
There are ways to hook up the "airplane" battery to the car so that the car will keep it charged while driving, yet separate them when you are using the "airplane" battery to charge aircraft.

I use my double truck batteries, I have a lead going back to the rear so that I can plug in my chargers.
I have charged 4 cell 4000mah batteries for 4 different teams of collage kids, probably 16+ times in one day with no trouble to start my diesel pickup after all that use.
A good condition, fully charged, large car battery, will provide many charges
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