You can use a DC only charger at home but you would need a power supply to convert the house's AC current to a DC current but that would mean spending another wad of cash. I would suggest the Dynamite prophet plus II. I got one at my LHS for 80$ canadian it charges nicads and nimh's with a charge rate of 1,2 or 4. this charger is AC/DC so you can use an outlet or your car battery directly.
http://www.dynamiterc.com/Products/D...ProdID=DYN4054