I charge one battery at a time, charging at the lowest possible setting. It takes longer but that's whats reccommended. I've seen someone with two chargers charging two batteries and he seemed to know what he was doing.

Saft length is 42" on my kota and It is plenty. I don't now if they come in 36 but I think that would be to short.
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if u can't stand the heat then get out of the kitchen