Do Car Chargers Drain Battery

If your car consistently won t start it s possible that the battery is worn out.

Do car chargers drain battery.

If the car battery is old it may not be holding a full charge any more either. To prevent your car phone charger from draining your car battery you should unplug your charger from the power source when it is not in use. Using some alligator clamps and a multimeter big mess o wires figured out much the usb charger draws in standby mode then figured out what effect if any it d have on a car s battery. So depending on phantom load of the charger it could drain the battery enough that it cannot start the car or even completely drain it.

If the test light is lit with all accessories turned off and the doors are shut so that the dome light will not come on than you have a drain. With the negative terminal disconnected a healthy car battery will self discharge at 5 per month. The nature of charging your phone in your car poses a risk to your phone. Take the positive battery cable off your battery and using a good working 12v test light like this one attach one end of the test light to the battery and the other end to the positive battery cable.

You should generally replace your car battery every 3 4 years. If your battery is old or weak it will not hold a full charge well. Depending on the circumstances that could be enough to drain your car battery dead. Leaving the charger plugged in when not charging a cell phone may also drain the battery s power but this will be a slower drain on the battery than if charging a phone.

What to do with a battery that keeps dying. A typical car battery will drain in 2 3 weeks and be unable to start your car due to the parasitic draw from the car s electronics. Most people use the cigarette lighter. That s because car batteries suffer from the same discharge problems that smartphone batteries do just on a.

A car battery holds around 800 watt hours of power. If old or poorly maintained your battery may die on a regular basis. Do car batteries lose charge when not connected.