Yeah your probably right and I can't remember when I changed that battery. It doesn't seem like it was that long ago, but then again time flies when your having Fun ! Maybe it's time to get my load tester out and check it before winter gets here.A healthy car battery should deliver 12.6 volts when the car is off. So if the CB gives you this alarm when the engine is off but there are no problems when the car is running, it means your battery voltage is insufficient. Therefore, the battery is old or needs to be replaced.