I have no experience with Black and Decker batteries, but have had DeWalt batteries do that. I would take the bad battery and place a penny in each of the power terminals. See pics. Take the good battery and make SURE to connect (+) to (+) and (-) to (-). Connect only for several seconds. Place bad battery on the charger immediately. I have revived several batteries in this manner. Please use caution when using this procedure. As a precaution make sure to do this outside in case of fire.

Turn the dial just above the bit to the highest setting. (The dial with the numbers on it). You should be able to get 250 lbs of torque on this model.

The chuck has been tightened that is why you can't get the bit out. Here's what to do

Grab a pair of plyers and gently try to loosen the chuck instead of your hand and this should release the chuck back to normal

Stopping then starting after a “rest” is a signature symptom of a thermal problem. Likely, the speed control circuit connected to the trigger.

However, with the battery lights flashing, that might indicate there is too much current being drawn by the tool and the battery has been shut down to protect it. The tool might have shorted windings. Economically, that may be a show stopper for a fix.

time to do a bit of surgery.

https://www.youtube.com/watch?v=gEc6LTdn...

it maybe just a wire or maybe a bearing went bad or lastly the armature may have fell out of it’s retaining area.

copeland9 the chargers are available on ebay.com Batteries for this unit are no longer available but you can try and find replacements based on the manufacturers number on those (let us know what number it is if you need help with that) or you can build one similar to this one Repairing Black and Decker - TS221 Ranger CD2000 Battery

To use 5vdc all you need to do is connect the battery and drill away. All battery device will usually handle as much as 3 VDC more than they are rated. As far as 12 vdc you will need to drop the voltage and the easiest way to do the is hard wire a cigarette lighter to cell phone adaptor inline between the battery and your device. I personally have modified the connections on many of my 18 VDC and some 14 VDC devices to connect to a 24 VDC pack I .ade and so far so good.