Wondering if I am charging my batteries the right way. I hook up the charger on one battery and put the selector switch to "ALL" and thought it would charge both till meter shows full and in float mode. Went out to Cat and had switch to ALL during the trip there and was showing 13.5 - 13.8v underday.., switched to Bat 2 while anchored to run bait and electronics and after 2 hours it did not have enough juice to start motor and had to switch to Bat 1 to fire up. So it could be a bad battery and will pull to get tested. So I am wondering if I am charging correctly and should I bring a volt meter next time to make sure both are being charged. Thanks gents.