Husbands key wouldn't open the car so used key itself to open drivers door which of course started the alarm. Had to be somewhere so managed to turn off the alarm by clicking on the Lock button then drove to where we needed to be,  which also happened to be by a good Car Accessory shop. Bought batteries for the fob and got back home without incident. Changed the batteries and used the key to lock the car. Didn't use the car again for 48 hours.  Went to open again and nothing happened.