In Feburary 2016 09,
Open the hood of the car and remove the battery cables with a wrench. Remove the positive (+) red cable first then the negative (-) black cable. Lift the battery out of its tray and place it on a work bench.
Put on safety glasses and rubber gloves. Clean the battery posts by placing a battery post cleaner on each battery post then twisting it back and forth until the posts are clean and bright.
Connect a load tester to the battery's positive terminal first then to the negative post. The positive post is the larger of the two and will be marked with a plus (+). Connecting the positive terminal first will prevent sparking. Switch the load tester to 'TEST' and check to see that the arrow on the meter does not drop below 12 volts. If it does or if it drops to the bottom of the scale and fails to come back up, the battery cannot be saved and must be replaced. If it reads 12 volts, it can be reconditioned.
In Feburary 2016 09,