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Old 04-11-2009, 11:45 PM   #17 (permalink)
al74dart
2008 Scion xBer
 
Join Date: Mar 2009
Location: Payson, Arizona, USA
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Battery charging rate

Just a note on charging batteries. The recommended maximum charging rate should never exceed 10% of the battery's amp hour rating. If you have an 85 amp hour battery than 8.5 amp is the fastest you want to charge it. The above is for wet acid batteries. If you have a gel cell or AGM or other not wet battery you will want to charge it at an even lower rate, see battery manufactures recommendation. I usually try and not exceed 5% of the battery rating if possible. I was in the marine business and many of the boat batteries I had to replace were quick charged and damaged the batteries over time thus shortening the battery live.

Al
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