Do Car Chargers Drain Battery

What to do with a battery that keeps dying.

Do car chargers drain battery.

If the car is turned off just as with the lights inside the car the cell phone charger is drawing power from the car s battery. Most people use the cigarette lighter. 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. If your battery is old or weak it will not hold a full charge well.

Do car batteries lose charge when not connected. 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. A car battery holds around 800 watt hours of power. You should generally replace your car battery every 3 4 years.

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. And by the way here s how to tell which apps are draining your phone s battery. 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. If the car battery is old it may not be holding a full charge any more either.

The nature of charging your phone in your car poses a risk to your phone. If your car consistently won t start it s possible that the battery is worn out. 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. Depending on the circumstances that could be enough to drain your car battery dead.

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. That s because car batteries suffer from the same discharge problems that smartphone batteries do just on a. With the negative terminal disconnected a healthy car battery will self discharge at 5 per month.