Purchased 2005 car in June of 2015

21000 miles

Today, both fob's would not unlock door or start car. Took one fob to batteries plus and they tested and said it was low so replaced batteries. The door still will not unlock. I read on another fob topic that the red light will come on if the batteries are good. I had never noticed them before. They were not coming on and are still not.

I last drove the car on Sunday. Could the battery have drained? I do not know how old it is. I will place the charger on it now.