Dewalt sds 18v drill with full battery.when i press the drill bit on the wall the motor slows to a stop and when i release the pressure it picks up speed.what could be the problem and how can i fix it

SOURCE: i HAVE A DEWALT DC729 18V DRILL

is this a north american model.all i can find is model DC727 & DC728 model. charger model 9116 & battery is DC9096 may work.charger volts 110v ac. if your buying the individual part like batt & chgr its more expensive than buying the whole kit is cheaper. hope i answer your question

SOURCE: sds drill stuck in chuck

tap it lightly with a ball pin hammer, if that dosnt shake it out try opening it and useing something to push it through

SOURCE: Holding battery charge on 12v DeWalt batteries

Are batteries for the dewalt cordless drill interchangeable? Will an 18 volt battery fit in a 12 volt drill?

SOURCE: jammed chuck

Use a pipe wrench to turn the chuck open. J.

SOURCE: Can't remove bits

I had this problem on my De Walt DW912- I simply couldnt turn the keyless chuck to remove the screwdriver bit and there was no obvious reason why.
I placed the unit on a solid surface so that the chuck/ drill bit was pointing vertical. I then used a mallet and a metal chisel to gently tap each of the 3 chuck jaws back into the chuck body. It worked!
Turned out that there was the absolute tiny amout of corrosion between the jaws, and the chuck and my tapping had just broken the siezure. I now remember that it started to rain slightly last time I used it.
Some spray release agent or perhaps WD40 would probably have done the same job but I wouldnt have believed so little corrosion could have done this so didnt realise this was the problem.