What is the the max amp capacity of the charger? It is recommended that the charger amp capacity rating be within plus or minus 10 to 15% (I was taught 10% other say 15%) of the ahc capacity of the battery. I have seen 1000 amp chargers used on 680 batteries & they "boil" the heck out of the charger. The main issue is when the battery is first connect to the charger - there is a 'blast" of amps (aount varies by charger rating) delivered to the plates of the batteries to "clean" any sulphate build up.
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