It's the charger's problem, if the battery gets to low the charger doesn't recognize it and won't start charging. I use rc chargers for most of my batteries and never run into this type of problem.
Remember, li ion batteries don't like to be run down to low so charge them often.
Lowes would want a reciept or proof or purchase which i dont have dewalt told me to take it to the authorized repair center its not close and hard to get over there while im running calls
That's unusual...Lowes always honors my returns...I just had to give them my phone number.
But that aside, you been given the the best information to resolve your problem but you say time will not allow you to get to DeWalt service center. So how can we help any further? If this tool is as important to your work as you infer, than I suggest you ship it or make time to drop it off.