I gave up on battery drills. The battery would always run down with the screw halfway in. Then it's go get the corded drill anyway. Might as well start with the corded one.
You need to try one of these[1]. I finally bought one and everyone who has used it loves it, so far. I suppose it isn't really the best for putting in screws but it works wonders on any sort of drilling (bit or spade).