Skip the auto shop - Our mechanics make house calls

Q: Battery dead after car sat for one month

asked by on

While I was on a month-long trip, my car sat in the garage without being started. Now my car will not start. The lights do turn on and makes two clicks, but nothing happens after that. After jump-starting it, I took it to an auto shop to have the battery recharged. The clerk told me that it was definitely dead all the way. When I picked it up later, I was told that the battery was good then. After getting home I connected the battery using positive first and then negative, which sparked a bit. Then when I tried to start the car, everything shut off completely and there was no power at all in the whole car. When I jiggled the battery a bit, there were some sparks and the power did come back on (the lights, dashboard, etc.). However when I tried to start the car it shut down all the way again. I jiggled the cable and doing that brought everything to life. Can you tell me how to fix this in a permanent way so I won’t keep having to go through these processes?

Hi there. It sounds like the battery has an internal short. I would replace the battery. I would also make sure that the connections at the battery cables are clean and tight. If they are loose at all, then the cables should be replaced. This vehicle has a lot of electronics in it so it is imperative that the voltage in the system is sufficient enough to run everything. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the battery problem and perform any needed adjustments or repairs.

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. Battery dead after car sat for one month

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: Xenon lights only dim when switched on

Hello, thanks for writing in about your 645Ci. From what you've described, the bulbs will need to be replaced most likely. They will become very dim when they are going out and will shut off completely at any moment at...

Q: It seems like the engine isn't receiving fuel properly.

Hey there. It is possible that there is a weak fuel pump issue, but there are several possible problems that can cause an engine to misfire. There could be a faulty ignition coil, a bad fuel injector, clogged fuel filter,...

Q: Truck keeps dying but battery is good

You may have an A/C blower that intermittently stays on due to the blower control module in the blower housing causing it to stay on. In order to verify the problem, the blower will stay on even after the ignition...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...