how do you change a car battery
Replace the battery-Place the new battery where you just took the old battery out, with the positive and negative terminals on the correct sides. Connect all the screws, clamps or bars that may hold the battery in place. 3. Reconnect the positive terminal-Tighten the clamps using a wrench. Finally, you should check the alternator. 2  Some cars also have a battery meter, with the engine running, the alternator usually maintains a charge close to 13.8-14.2 volts in a properly functioning charging system.