ah you are fine with your fancy Dewalt.....it will def get the job done. You will be surprised how fast a grinder can drain a modern lithium ion battery but still I think you will have time to get the cook box cleaned out for sure. The brush cups catch hard on some edges of the cook box and try to grab the grinder out of your hand....so be ready....hold on tight....and dont let your guard down. My grinder bloodied my up several times on my first few grills.....I learned my lesson......and the gloves I now wear take care of the times when I still get a lil careless.