How does an auxiliary battery work?

An auxiliary battery’s functionality depends entirely on the particular vehicle and the electrical system it employs. When the car’s primary battery dies, the auxiliary battery kicks in to keep the car’s electronics running.

What is an auxiliary battery?

When the primary battery cannot meet the electrical demands of the vehicle, an auxiliary battery takes over. The battery’s primary function in many contemporary automobiles is to initiate engine cranking and manage onboard electrical components.

How to charge auxiliary battery?

This can be done through the vehicle’s charging system or using a dedicated battery charger. Storage: If the auxiliary battery is not in use for an extended period, it should be stored in a cool and dry place, preferably on a battery maintainer to prevent self-discharge.

Do auxiliary batteries need a mechanic?

Auxiliary batteries, like your main battery, need to be checked regularly for corrosion, damage and leakage. Depending on the location of the battery, this could be difficult for you to do yourself and you may require the assistance of a mechanic. What Are the Signs of a Bad or Failing Aux Battery?

Is a 12 volt battery an auxiliary battery?

The 12 volt battery can be referred to as an auxiliary battery, but it’s just as important as the high voltage battery that powers the motors that drive the vehicle down the highway. The 12 volt battery is charged through a DC-to-DC converter built into the vehicle’s high voltage battery system.

How do I find auxiliary batteries for my car?

The easiest way is to enter your vehicle information on the fitment finder on batteriesplus.com to see if we have an auxiliary battery solution for your car. If you can't find or no longer have your car's owner's manual to look up the location of the batteries, you could also get your hands a little dirty and look in the car.