Yup, over night charger. Look into getting a AC6 or for a few bucks more the AC680 from hobbypartz.com if you are also charging lipos or plan to go lipo at some point. They are good starting chargers. If all your charging is NiCDs or NiMHs then hop on ebay and pick up a used piranha fast charger for 6 and 7 cells packs. You can pick one up for 15-20 bucks.