Car radio power is something not that many people think about. However, it is important for you to be able to understand how long you can expect your car radio battery to last. This is something you should especially think about whenever you listen to the radio more than you drive your vehicle.
Something you should keep in mind is the fact that the deeper the discharge is, the fewer charging cycles you will be able to get from your battery. This means that if you happen to be running amplifiers that are high power with a high output level, that there will be a much faster discharge of your battery. If you are working with a stereo that has a low output level, then reduced battery life is expected. Most new car batteries can handle up to 100 hours with a radio, but this number is decreased with prolonged listening and higher powered stereo systems.
You will find that the average life of your battery is going to be about 5 years. This is something that depends heavily on whether or not the cable ends are taken care of and the water level is where it should be. If you take exceptional care of your battery and do not waste the life of the battery too much, then you may be able to expect longer than 5 years.
When it comes to car stereo amps, there is something you should keep in mind. Running the radio for a long amount of time without your car running can drain your battery short term.