To change a car battery, loosen the nuts that secure the cables to the terminals, and then lift the battery out of the car to exchange it for a new one. Wear gloves and safety glasses to protect yourself from acid leaks.
- Mix a cleaning solution
Mix a cleaning solution together that is one part baking soda and one part water.
- Tap on the posts and cables
Use a hammer to tap on the terminal posts and cables to remove some of the sulfate deposits.
- Clean the terminals
Dip a paintbrush in the cleaning solution, and brush it on the terminals to remove the rest of the deposits.
- Wipe the terminals
Use a rag to wipe the terminals clean.
- Trap acid leaks
Use duct tape to seal any cracks in the battery where acid might leak.
- Remove the terminal cable from the negative post
Use a wrench to loosen the nut that secures the terminal cable to the negative post, and hold the head in place with a pair of pliers.
- Disconnect the cable
Disconnect the clamp once the nut is loose to remove the cable.
- Remove the positive terminal cable
Repeat the procedure to remove the positive terminal cable.
- Remove the restraint
Loosen the nut that secures the plate over the battery.
- Remove the battery
Grab hold of the handle or the sides of the battery, and lift it out of the car and onto the ground.
- Clean the cable clamps
Use the paintbrush to remove stray sulfate deposits from the cable clamps and battery compartment.
- Spray the terminal cables
Spray the ends of the terminal cables with corrosion protection.
- Secure the new battery
Place the new battery in the battery compartment, and secure it.
- Clean the cables
Clean the new terminal posts, and spray them with corrosion protection.
- Connect the cables
Connect the positive cable before the negative cable, and then secure the nuts.