Q: Why do I need to charge my car's battery ever week or two but I cannot find an obvious problem withe the electronic system.

asked by on

Every week or two the battery is low and must be charged. I think all systems are working fine. The car is started in the morning, and again in the early to late afternoon and driven for a mile, about 5 minutes of running. I know when the battery is low because the car turns over very slowly. It is often driven with the air conditioner or heater on and with headlights on.

My car has 60000 miles.
My car has an automatic transmission.

If you are starting the car and only operating it for a very short period, such short duration operation does not give the car’s charging system sufficient time to re-charge the battery. Consequently, repeated short trips, especially in cold weather conditions, can slowly discharge the battery. If the car must be used in that fashion, it is perfectly acceptable to routinely use a high quality trickle charger. I emphasize "high quality" because you don’t want a cheap charger that could damage your car’s electrical system (particularly the car’s PCM and bevy of microprocessors). If, however, this problem of slow battery drain is occurring even when you drive for extended periods, then the battery and charging system should be tested and the vehicle’s electrical system should be tested for phantom or parasitic loads, too. If you desire a conclusive diagnostic, please simply request a battery/charging diagnostic and the responding certified mechanic will resolve this for you.

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
  1. Home
  2. Questions
  3. Why do I need to charge my car's battery ever week or two but I cannot find an obvious problem withe the electronic system.

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: Truck no longer starting

The battery and starting system would need to be checked to see if the battery or the cables are a problem. The charging system should be checked also. I recommend having a certified mechanic, such as one from YourMechanic, come...

Q: What could be causing to heat to only come out of the defrost vent?

Air is directed to the floor, dash vents, and defroster by vacuum controlled blend doors behind the dash. When you select where you want air flow on the heater control head, vacuum is directed to different vacuum connections to move...

Q: Loss of power in certian areas

I can't tell you exactly which wire it is that would cause this, but whatever wire you pulled is very likely to be the cause of all these issues. It sounds like it was a main power or ground wire...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.