Can A Car Stereo Drain Your Battery. The simple answer is yes but a car battery can only be drained when it sends more power than receives back from an alternator. Disconnected the radio and it will start after not being driven for over a week now.
So the battery on my car would drain after only around a day or two if the car hadnt been driven. Your 12v battery will deliver power to your car to do things like saving your radio presets keeping the clock running and. The best option will usually be to jump your cars battery.
What to do if your radio battery is draining.
A clock in the radio draws as little as 001 amps whereas the combined interior lights can exceed 1 amp. Simply put this shouldnt harm your car - but that said there are some things you may need to do. Parasitic drain occurs when vehicle components continue to draw power from your vehicles 12v system even after the key is removed entirely. As a general rule before fixing a car stereo draining battery you need to know if the stereo is old or newly installed.
