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Page 1 of 2  Your car’s battery is a storage container that gathers electrical power (produced by the engine) and stores it for use by lights, motors, relays, and other gadgets. So it’s important that the battery hold the charge.
Fortunately, modern sealed or maintenance-free batteries don’t need much service. Other than periodically checking the battery connection (Driveway Maintenance), there’s little to do except wait for the day it should be replaced. Typically that’s every 3 to 5 years.
Car Security Code
Many new cars have a security code that must be re-entered into the radio if it is disconnected from the car’s battery (as in a theft) or if the battery itself is disconnected. The owner’s manual will tell you if this is true for your car and what to do about it. Typically it means making sure you have the security code before you disconnect the battery and re-entering it when you’re done.
Here’s how to replace a car battery. You can do it yourself:
1. Find the car’s battery; it’s usually under the hood on passenger’s side of the car, but could be just about anywhere.
2. Disconnect the cable from the negative (-) side of the battery first, then the positive side. Use a battery brush to clean the terminals.
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