Looking to spend some money and upgrade the winter maintainers and chargers I have in my garage. There are too many CTEK options out there so looking for advice on which is the best. Speed/quick charging is never needed and is mostly for maintaining batteries over the winter or vehicles that are not being used. I am charging everything from lead acid car batteries, to deep cycle agm batteries, to jetski/motorcycle batteries and lithium motorcycle batteries. Any suggestions on which charger is the best would be helpful. Thanks!