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.

This tells me the batteries were shot. Buying two new batteries cost
more than the drill so I threw it out as junk.

I bought a Makita 12V at HD for $20 more than the Ryobi (it was a
closeout special ; ) and have had it for several years and it is
great. The batteries are always in the state of charge that I left
them in.

So, to be honest I would really shy away from anything Ryobi in the
future.

You get what you pays for and you pay for what you get is my motto.
Chris