Q: Battery dies out after a few days and everything checks out fine

asked by on

Hello. My car runs fine and I use it moderately. I drive to work on week days and sometimes during the weekend, and it has no issues with the engine turning on or anything similar. The issue I have is with the battery. The car has a completely new battery, but it happened that it died out once when I went to a trip that lasted about 5 days. I had to buy a new battery as the last one was totally unresponsive. It unfortunately happened again so I took it to a mechanic and had the battery tested as well as alternator and all works well. He couldn't find anything wrong. Do you have any idea what causes this and how to fix it? Thanks.

Sounds like you may have a parasitic draw that is taking down the charge level on the battery. The vehicle has a process by which the computer in the vehicle are shutdown to prevent draining the battery. Sometimes a faulty computer or circuit can stay active and will not go into this "sleep" mode and drain down the battery. Generally, the vehicle will have to be placed in conditions to fall asleep, and then one-by-one, fuses are removed to find the circuit keeping the vehicle electronics awake. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will be able to locate and correct the electrical draw.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Battery dies out after a few days and everything checks out fine

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Wireless locks occasionally stop working, battery died several times

Hello. I have ran across this a few times on this vehicle. Most of the time it is caused by a failing ignition switch. If the switch is failing internally then it will lose contact randomly and this will occur....

Q: What does it mean if the "O/D Off" light comes on while driving? 1999 Ford Explorer

Hi there - first thing to check is for correct fluid level in the transmission. If fluid level is correct, the most likely culprit here is a bad vehicle speed sensor. A bad sensor can cause the transmission controller to...

Q: my car feel like it is going to the left on highway.I have done the alignment

If the tires are new (and not defective) and have uniform air pressure (i.e., exactly the same pressure on left and right side of vehicle), a possibility is the wheel alignment is off with the specific issue possibly too much...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...