I've just about had it with cordless tools..... batteries are the weak link there and the run time ain't worth squat. I have a few 14.4 Ryobi tools but the batteries go bad and now need replaced (for the 3rd time). I am a firm believer in corded tools...... JMO
PAV - have you used the Lithium Ion battery-powered cordless? They are not just better, but MANY times better than the older NiCad technology. If you've replaced the batteries 3 times, I would guess they are NiCad. I replaced the 18V NiCad's on the Milwaukee hammer drill at work with Lithium Ion (pretty expensive!), and it is amazing! I have the same drill at home, and will replace the batteries with Lithium Ion's, when the time comes.
NiCad's had ALL kinds of shortcomings, early ones could develop a "memory", if not drained all the way before charging - if you used it 20% only, and charged it up from there, time after time, then it would form a "memory", and when it used 20%, would believe it was depleted. They could be "cycled" to remove most of the memory, but was still affected. Another problem was that they would slowly reduce their performance, as the voltage decreased. At 70% depleted, you'd have 30% power. The LiIon batteries maintain full power, until just before they are depleted.
They also last a LOT longer, than the NiCad's. Pretty much ALL high quality cordless "anything" is now Lithium Ion. All the cell phones are, and those are used constantly, often to total depletion, charged daily, and are lasting for years.
I use corded, when I can. But for a LOT of jobs, it's just not practical, and my cordless tools do just fine.
Roger, the Tool Man