I bought a Ryobi 12v battery powered drill from HD some time back.
Exactly 1 year from my purchase date (h'mmm) the batteries would no
longer hold a charge longer than about 4 hours. They worked great, buy
you had to leave the a battery in the charger all the time.

I have a 14.4 Ryobi drill, vintage 2000. The drill is used almost daily, and
the batteries still have about 3/4 of their capacity. It's only an ok drill,
but the battery life I've gotten out of it is far better than any of the
other name-brand tools I have.