charging a dual purpose starter/deep cycle battery

[NakedDog]

What setting do I use on a dual purpose starter/ deep cycle battery? There are 3 settings on my digital smart charger: regular, marine/deep cycle, and AGM (which I know is not the correct setting)

 

[nimmor]

Re: charging a dual purpose starter/deep cycle battery

I use the deep cycle setting on mine. The key to long battery life on a deep cycle, including the dual purpose, is to charge them back up quickly. The deep cycle setting is a faster charge than the regular cycle.