Of course the first time my GPS car charger dies is the time I'm in a state 3,000 miles away from home. Needing to use it for a trip out to California the next day, I quickly tried to locate a Best Buy or equivalent to find a replacement.
This Best Buy location is pretty large and easy to find off Maryland. I found the staff to be extremely helpful and the lines to be very short. You can even pay in most areas of the store where you find your items.
Parking lot on premises.