Car batteries can last for several years, but if they're not properly maintained, they can die on you, leaving you with no way to start your vehicle. This typically happens at the worst possible time, leaving you stranded with no way to get you to your destination. Most times, when a battery is dead, there isn't much chance of recovery. But sometimes, there is a chance that you can revive the battery one last time to be able to get your vehicle to a parts store or repair shop to get a new battery.
Open up the hood of the vehicle. Put on rubber gloves on. Remove the negative terminal on the battery using an open-end wrench, then repeat for the positive terminal on the battery.
Locate the rectangular plastic caps on the top of the battery, which are used to check the fluid levels in the battery. Remove the plastic caps using a flathead screwdriver to pry them off.
Locate the circular cells underneath the caps and the marks in the plastic which indicate the fill mark. Pour distilled water into each of the cells until the level reaches the fill line. Reinstall the plastic caps.
Connect the black alligator clip from the battery charger to the negative terminal of the battery and the red alligator clip from the charger onto the positive terminal. Adjust the settings on the battery charger so the output is a low amp rating, preferably under 4 amps. Turn on the charger and allow the battery to charge for four hours.
Reconnect the positive terminal onto the battery and then the negative terminal using an open-end wrench. Disconnect the alligator clips and attempt to start the vehicle. If it does not start, try charging the batteries for another four hours and then try again.
