Rockingham Honda

How to Remove a Car Battery

Car Battery with Tools

Your car battery is an essential component of your vehicle, as it:

  • Starts the car
  • Keeps it running
  • Powers all electrical systems and features

Unfortunately, a car battery doesn’t last forever, and eventually you will have to replace it. The good news for Lawrence-area drivers is that removing and replacing a car battery is a relatively simple procedure, but it must be done in the proper way to avoid potential injury. This guide from the service team at Rockingham Honda will provide you with the steps on how to correctly remove a car battery.

Step One: Preparation

The first thing you need to be aware of is that car batteries hold enough charge to deliver a lethal shock. We strongly recommend that you wear insulated work gloves when attempting to remove the battery. We also recommend that you wear safety goggles to protect your eyes from possible exposure to battery acid, which is corrosive and can be extremely dangerous. When you are ready to start removing the battery, make sure that the vehicle is turned off. If the car is left running, then critical hazards like live electrical currents or sparks igniting flammable agents are possible.

Some other things you should do to safely remove the battery include:

  • Remove any jewelry, such as necklaces, watches, and bracelets, to prevent getting a shock if they come in contact with the battery.
  • Ensure you’re in a well-ventilated area to prevent exposure to harmful gases.
  • Find some zip ties or another type of restraint to keep the battery cables in their proper place. If they touch, it will create sparks and become a fire hazard, so it is of the utmost importance that you prevent the cables from touching.
  • Have a piece of cloth on hand to cover the end of the positive cable once you have removed it. This will help you avoid the risk of metal-to-metal contact.

If you find that the terminal is fused, you can use a special battery cable removal tool to get it loose. You’ll find these available in Methuen-area auto parts stores, as well as in the Parts Department at Rockingham Honda.

Step Two: Removal

Once you’ve properly prepared, follow these steps to safely remove your battery:

  • Locate the negative terminal. It should have a black plastic cover or a minus sign that will be found either on the post or on the battery casing near the negative terminal.
  • Take hold of the bolt head of the negative terminal with a wrench or pliers and hold it still.
  • Use other pliers or wrench to loosen the nut enough to gently pull off the negative cable. Once removed, secure the cable with zip ties away from the battery.
  • Repeat the above step for the positive cable, taking care that the two battery cables do not touch. Remember to cover the end of the positive cable with cloth.
  • The battery should be held by a securing bracket. Use your pliers or wrench to take out the screws and bolts that hold it in place.
  • Lift the battery straight out of the bracket and keep it level and upright. Note that a car battery is fairly heavy, often weighing up to 40 pounds.

How Many Volts Does a Car Battery Carry?

Typically, a fully charged car battery has 12.6 volts or more. When the engine is running, the voltage can be anywhere from 13.7 to 14.7 volts. It’s important to have your car battery and electrical system tested a couple of times a year when you bring in your car for service. If you’d like to test your car battery yourself, follow these DIY steps:

  • Start your car and turn on your headlights. 
  • If the lights are dim, your battery may not have a full charge.
  • If the lights get brighter when you rev the engine, the alternator may be producing some current, but not enough when idle to keep the battery charged.
  • If the lights have a consistent level of brightness, even when you rev the engine, your battery is likely working normally.

Be sure to ask our service experts for a battery check the next time you bring in your car for maintenance near Haverhill!

Choose Rockingham Honda For Professional Car Battery Service

If you’d like our certified technicians to test or replace your battery, schedule an appointment with us online. It is much safer to have a professional handle removing your car battery. Need to purchase a new battery? Our Parts Department carries a fine selection of batteries for your Honda car, truck or SUV, all backed by the Honda battery warranty. If you have any questions or would like to know how to jump start a car battery, please feel free to contact our Service Center.

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Rockingham Honda 42.7495775, -71.2046905.