Hello Lee, Although I'm not familiar with your model, I have noticed the same problem with other manufacturers . I have had to glue plastic strips to the button that is used to unlatch it from the charger once I got the battery dislodged.
hold the black part of the chuck with one hand and turn on drill with a bump and the chuck will open. then insert bit. if you feel chuck not open reverse the switch and it will open.
Yes! Rechargeable batteries can be rejuvenated by draining them fully and then recharging fully and then repeating a few times! The trick is to fully drain and fully charge!
Put the bit in a vise and try to turn the drill to release the bit. You will need to put a wrench on the area of the drill that's holding the bit and do the turning by the wrench.
I just went through this with Porter Cable 18V but I can't say it is the same for Ryobi. On the PC, all 18V batteries are interchangable on the tools, but the charging needs are different. A dedicated NiCad charger can't shouldn't be used for liOn but the later chargers will work for either battery.
Ryobi offers an 18V upgrade:
RYOBI Tools
Pull the brushes out and make sure they are in good shape. Sping the motor by had then put the brushes back in and see if it works. Often times the brushes get blocked by wood dust. If not check the power cord and switch for continuity.