Can A Car Charger Drain Your Car Battery

A typical car battery will drain in 2-3 weeks and be unable to start your car due to the parasitic draw from the cars electronics.

Can a car charger drain your car battery. If your car has high phantom drain or has lots of electronics that will activate for some time after seeing power you may struggle to get any power to the battery. If you have a good charger it can fill your batterys capacity very quickly drawing in power at higher currents. But that wont be from the LED lights on your charger.

Even if your phone itself is not plugged into the charger if the charger is still plugged into the 12V outlet cigar lighter it could still draw current from the car battery preventing it from being fully charged. After an hour or two thats enough current to completely drain the typical car battery. The Causes of Battery Drain.

Avoid Car Battery Drainage Even when it is not charging anything leaving the phone charger plugged in may drain the car battery and may deplete its power if the engine is not running which could leave you stranded or make for an inconvenient morning. At some point youll want to charge your battery up to four times faster with a Level 2 charger. Lets get into the details.

Batterys not very old maybe a 2 year old Die Hard Gold and I. If your vehicle sits too long without a charge from the alternator while charging your devices it could drain the battery. In most cases and in most modern cars and trucks leaving a USB cable or charger plugged in will not quickly drain the battery while the car is off.

Indeed leaving your charger connected to the battery for a long time can cause overcharging. But there are a few cases where it is probably wise to remember to unplug them each time. Is that fast enough to give you the range you need for the next day of driving.

Which means you can freely leave that USB charger plugged into the cars 12V jack if you want provided you dont plan on putting the car in storage for around 117 days. It really depends on a combination of the specific car and health of the battery as well as the charger you are using. However most modern chargers come with a smart function.