Skip the auto shop - Our mechanics make house calls

Q: New battery drained for no reason

asked by on

My four year-old battery died in my car. I replaced it with a new battery and a few days later, it was dead. None of the lights work and I can't find any reason why it would be drained.

There is most likely an electrical component that has failed, causing the battery to drain. These can be very tricky to diagnose. Basically, you need to be able to measure how much current is being drawn from the battery when the car is at rest, and slowly disconnect components one by one until there is no more current being drawn. Once you find the component that drops the current draw, you have found the problem. I would ask for help from one of the mechanics at YourMechanic to perform this test on your electrical components to see what is causing your battery to die.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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. New battery drained for no reason

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: Is there any way to get the seats to fold down in a honda civic coupe lx without using the trunk? My trunk is jammed shut.

Unfortunately the lever to lower the seats is located in the trunk on this vehicle. You will need to get the trunk open in order to pull the lever to lower the seat down. If you are unable to get...

Q: Mine is a 2005 Honda civiv, and is not starting, there is no crank sound.....

Depending on whether or not the vehicle will turn over will determine what the next step should be. If the engine does not turn over, I would recommend checking all connections related to the battery and check to be sure...

Q: Adding air intake

One of the best brands for performance intakes would be K+N. These intakes, however, make very minimal difference to a four cylinder vehicle. These engines have been designed to produce as much power as possible due to the fact that...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...