The factory charger works fine from what I have read but for long term storgage I purchased a smart charger for AGM that I will hook up directly.
Yeah I have come across this 2 - 6v = 3 - 12v before.... I told you it was unwritten. LOL. I had on person in a battery store say it and I saw a You tube video and he mentioned it as well. Perhaps the 6's are more of a true deep cycle? Not sure. Someone else can answer it better than I. All I know is the are much better than the OEM batteries and im happy with them. They have crazy quick recovery time. I can use for an hour or so, check with muti meter, turn stuff off and 5 - 10 mintues check them again and the batteries are back to 100 charge..... Kinda crazy.
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