Why does Chevy Impala have 2 batteries?

There's the primary battery under the hood, but there's also an auxiliary battery. These are used to power other systems on the car that require 12 volts of power, and which the alternator is not capable of powering directly. via

How do you rejuvenate old car batteries?

  • Remove the battery and remove the rubber that protects the caps. Then, remove the caps as well.
  • Fill a battery with the distilled water and recharge it.
  • You can also try to replace the acid inside a battery and mix a new acid with the distilled water.
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