Why is my car battery draining when its off?
What may drain a car battery when it’s off are things such as interior lights, door lights, or even bad relays. While your engine runs, the alternator recharges the battery — which is why you typically don’t have to worry about the battery dying while you’re blasting the radio on your drive to work!
Why is my stereo draining my car battery?
Car audio systems draw power from the car battery and will drain the battery if the engine and alternator are off or if the alternator cannot charge at a rate faster than what the audio system requires. Aftermarket systems may draw too much power, and poor installation may cause parasitic draw.
How do you stop a car battery from draining when not in use?
- 1) Use a trickle charger or battery conditioner.
- 2) Avoid turning your car on and then off again.
- 3) Avoid short journeys.
- 4) Drive your car for 15-20 minutes at a time.
- 5) Alternate trips if your household has more than one vehicle.