A dewalt dcd970 18v xrp and when i try to unscrew anything the bit comes loose. Can't figure out why?

DEWALT DC935KA Power Tool Battery Replacement
Type: Ni-MHVolt: 14.4VCapacity: 3000mAhColor: BlackWeight: 940gDimension: 113.80x80.80x108.20mm

http://www.drillbattery.com.au/buybattery.php/dewalt_DC935KA_power+tool+battery.html

I am thinking the switch or motor is bad, check the switch first. you can locate parts at dewaltservicenet.com. Make a wiring diagram before removing anything, these parts are polarity sensitive.

Yes. Dewalt says the 18volt XRP battery is compatible with all Dewalt 18volt tools

Have a great day.

I have used 2 channel lock pliers on both keyed and keyless chucks to break the chuck loose. just make sure you are going in the right direction. grab the chuck with one and the base with the other. always works for me..

Take a phillips screw driver and stick it into one of the key holes. Then take a flat head screwdriver and stick in one of the slots. And prise against the phillips.

Or you can wrap a belt or strap around the chuck hold it tight, then put the drill in reverse and unscrew it.

take 2 pr of large channel locks and grab both sections of the chuck, on section in each channel lock, and use this to break it loose

hold black chuck and put in reverse if dont work spay wd 40 in and around where drill bit goes and let sit a few hours

to take the battery apart you have to carefully cut it on the seam they are molded together. i am guessing you are hoping to replace the cells inside of it to repair the battery. I have done this a few times and can take quite a bit of patience and a good meter to figure out which ones are bad. make sure when you put it back together use some good qaulity abs cement so the battery does not come apart on you while using it.

you need a special jig to remove the chuck on this kind of drill

Chucks ARE meant to stay tight.
You also use drill to UNSCREW THINGS.