Battery charger

[msvx95]

Hi,

Can anyone recommend a battery charger that can be used for a car in storage. I want to get one as a gift for my father. He has his hot rod garaged for the winter, but is looking for a charger that can sense when the battery is draining and can kick on and off during the winter to recharge the battery. He already has one that can perform the 2amp slowcharge, 8amp medium charge, and 12amp full fast charge.
I've never seen what he's looking for, so can anyone help me on this? What specs am I looking for?


Thanks in advance,

Matt