If it's cordless, the question is: Do you want to drill many holes (energy) or drill a hole fast (power)?
Batteries are optimized for one or the other and not both at the same time.
A Ragone Chart can help you pick the battery technology for your particular needs.
Sometimes you can go through several cheap drills for the price of one good one and still come out ahead.
My drills are all corded and I've lengthened the cord on them so that most of the time I don't need a separate extension cord.