car wont recognize key fob or says battery low

For the past 6 months or so my car often either doesn't recognize my key fob or says the battery is low. it does this with both key fobs and i have replaced the battery a few times in each fob. Sometimes it takes several attempts to gain entry in to my car and has even allowed me to lock my fob in the car.

If you had a emergency you would not be able to do anything cause you have no transportation in a new car. Key to car will go out and won't let the car come on, period.