You have a choice of rapid and soft charge modes. Rapid charge enables 8 batteries to be fully charged to their maximum capacities in 1-2 hr. Soft charge takes about 3-4 hr but provides greater battery life, as well as compatibility with older, lower-capacity batteries.
An integrated deep conditioning system charges, deep-discharges and then recharges batteries automatically, in order to offer maximum rejuvenation. Batteries Not Included.