For sure you will face many problems, if you will drive the car without having self ignition, head-lights and horn. These components of car work effectively with the help of car battery. This is why you should keep your car battery checked always.
Twist the key and the engine cranks. It always seems to happen when you're behind schedule, as if the gods of internal combustion are eternally against you. You should've paid attention to that occasional bucking on the highway.