Battery Charger

Hey all, I need to get a new charger for my batteries this winter, I've always had the old school charger that once it's charged you disconnect everything. Does anyone recommend a specific one that won't break the bank or is just going to Walmart good? I want one where I can just hook it up and not worry about the battery draining through the winter. Is there a difference from the "trickle charge" and a "maintainer"?



Thanks and merry Christmas everyone!