Q:

What are some signs of an overcharged car battery?

A:

Quick Answer

Signs of an overcharged car battery include loss of water, battery failure or a hydrogen explosion. In vehicles equipped with an onboard computer, the overcharging battery causes faulty error codes. The most common cause of overcharging is a faulty voltage regulator. If the batteries fail prematurely, check the regulator or have an expert check it.

Continue Reading

Full Answer

When a battery overcharges, it leads to the cleaving of water. The electrical charge breaks the bond between hydrogen and oxygen in water, forming hydrogen gas and oxygen. Normally, these gases escape through the holes in the vent cap, doing no harm. However, as the water in the cells breaks down, the level drops. If the gases build up too quickly, an internal spark in the battery ignites the two gases, causing an explosion. The battery case usually breaks, and battery acid sprays over the surrounding surfaces. The acid can cause paint to peel and the metal to rust.

When gases dissipate, the lower levels of water in the battery expose the plates to the atmosphere where they oxidize. Unless the owner refills the water regularly, the oxidation reduces the battery's ability to hold a charge and leads to premature failure.

The onboard computers in vehicles depend on a regulated charge in the battery. If it overcharges, the check engine light often illuminates. Checking the computer with a scan tool often reveals erroneous diagnostic codes due to the overcharging battery.

Learn more about Car Parts & Maintenance

Related Questions

  • Q:

    How do you refill a car battery?

    A:

    Refill a standard car battery by pouring distilled water into the inlets located at top of the battery to the appropriate level. A standard car battery cannot have the water exceed past its recommended specifications as it can cause serious damage.

    Full Answer >
  • Q:

    What are some signs of bad ball joints?

    A:

    Signs of bad ball joints include hip pain ranging from mild to severe, limited movement in the affected hip, swelling, and a creaking sound in the hip. There are multiple conditions that can affect the hip and cause bad ball joints, including osteoarthritis, rheumatoid arthritis and avascular necrosis.

    Full Answer >
  • Q:

    What are some signs of renal impairment?

    A:

    Signs of renal impairment include hand and foot swelling, loss of appetite, flank pain, anxiety and restlessness. Lack of urine despite an effort to urinate, nausea and vomiting also indicate renal failure. Additionally, confusion and constant sleepiness are other signs of renal impairment, according to WebMD.

    Full Answer >
    Filed Under:
  • Q:

    What are some signs of pituitary problems?

    A:

    Signs of pressure from a tumor in the pituitary gland include headache, loss of body hair, amenorrhea or infrequent menstrual periods, increased urination and weakness, says Mayo Clinic. Additional symptoms include nausea, vomiting and loss of peripheral vision.

    Full Answer >
    Filed Under:

Explore