When you're doing a dangerous job, you don't expect your tool to be part of the danger. Check your drill to see if you have one of this recall list.

From the DEWALT website:

DEWALT has identified a potential safety issue with the internal wiring of some of the following drills which may create a shock hazard.

The following materials are affected:

DEWALT Model DWD110 and DWD112 3/8-inch VSR drills
Only date codes 2017-37-FY through 2018-22-FY, inclusive, are affected.
If the drill is marked with an "X" after the date code it has already been inspected and is not affected.
(The date code format is: YYYY WW-FY-__. YYYY = Year of Manufacture (i.e. 2017), WW = Week of Manufacture. Example: 2017 18-FY-__ = 18th week of 2017.)
If your drill does not have a date code or you cannot locate it, please contact us.