Battery chargers

[nvr2fst]

So I went out to the garage and noticed that my charger has neglected to do its job on the car. Its a pretty old Sears Diehard trickle charger that I think has seen its day. I need to buy another one, any good recommendations?
Are there any that charge two vehicles at once? Id like to do my boat and car together if possible in lieu of buying multiple.