Updated at: 17-07-2022 - By: Lucas

Modern cars, in contrast to older versions, feature numerous labels that explain how to control various aspects of the vehicle. An Engine Start/Stop button, for example, makes it easier to start and stop the engine. In addition to starting or halting the engine, the same start/stop button can be used to activate “Accessory Mode,” or ACC for short.

What is ACC?

Navigation, radio, and power windows can all be operated in Accessory Mode (ACC) without starting the engine. When you don’t know whether you’re starting the engine or turning on the Accessory Mode, you may become perplexed. In some vehicles, the ACC Mode can be used in a different way than in others.

How to activate ACC?

Do you have any questions about how to activate the car’s accessory mode?

Here’s how to do it.

the radio volume knob once, then three times on the stop/start button, all without braking. It is important to remember that starting and stopping an engine is different from activating and deactivating an ACC.

The ACC mode can be engaged in an older model car by turning the key to the first or second position while the ignition is on.

So, does ACC drain the car battery?

But does the battery in the automobile get depleted when using the ACC Mode’s functions?

In this situation, there are just two options: ‘yes’ or ‘no’. The battery won’t be drained by the ACC. In your automobile battery, do you ever wonder how these two probability may coexist? Consider the ACC system and how it may effect your car’s health further.

Let’s start with what happens when you turn on the engine in your car. There are four possible ignition faces, with face 1 being when the key is switched off and the ACC Mode is activated. There is an engagement stage and then the engine is started. All of this takes place in the final position of the wheel.

Turning the key or pressing the ACC button in the second position, on the other hand, activates the electrical systems in the other vehicle. Power seats, lighters, stereos, and even cigarette lighters are some of the most often used electrical components, but this varies by automobile type and model.

Your car’s high-power electrical components, such as the headlights, ventilators, and defroster, can all be activated by turning on the ACC. In other words, the ACC can drain the automobile battery, as previously stated. ACC Mode, on the other hand, may not deplete the battery if no active high electrical consumption components are coupled to the ACC system.

The age of the battery can also play a role in how quickly the ACC Mode drains the car’s battery. The ACC system and other electrical components consume a lot of electricity, and old car batteries can’t handle it.

When the ACC is on, these batteries might be drained even if the car is not being driven. Having a new engine can also affect the ACC Mode’s battery consumption. It is possible to use the battery for more than two hours in a new engine if all of the accessories are working properly.

If your automobile is powered by old batteries, you may want to consider turning off the automatic climate control (ACC). Leaving your car running for a few minutes at a time will help recharge your battery. When you return to driving the automobile, you won’t have to worry about how to restart the engine.

How Long Is It Safe To Play Radio In ACC?

The radio in your car is a popular choice for many people, especially when they are relaxing someplace, whether it is after a hard day of travelling or when parking. Despite this, the biggest concern is how long to play the radio, especially if you’re using the car’s ACC.

To begin, there are a number of variables to consider, such as the state of the battery and the type of entertainment system installed. Typically, if the battery is in good condition, the radio can run for two hours. Battery recharge is required after two hours of inactivity.

In addition, you may have installed a different radio that has additional capabilities and a display, which could be the problem. You must use extreme caution in this situation, since a poorly placed radio can quickly drain your battery.

Will Acc Kill the Battery?

In rare cases, the ACC drains the car’s battery, but it won’t completely destroy it. In order to preserve the battery, the ACC has been engineered to consume minimal power. Car batteries are affected by the ACC appliances switching several electrical components.

Turning on ACC activates power-consuming electrical components, and if you leave them running for long periods of time, your car’s battery will be depleted. As a result, you’ll have to crank the engine to get some juice.

Is It Bad To Leave My Car In Accessory Mode?

Because it can save fuel, it’s not a bad idea to leave your car running in accessory mode. Consider a situation in which you need to use your car’s headlights or radio but are unable to do so without the vehicle’s engine running. Naturally, this car will use a lot of gas.

However, if your battery is in good condition, you can leave your car in accessory mode. Avoid leaving your automobile in accessory mode if it is in poor condition.

How Do I Preserve Battery Life When A Car Is In ACC Mode

  • Always before turning off your car’s engine, ensure it runs for the required period.
  • Replace your battery if it is old
  • Consider disconnecting sub-woofers and amplifiers when listening to the radio.
  • Consider turning the engine after 35 minutes for the battery recharging.


The battery in your automobile is not depleted or depleted by activating ACC or accessory mode, but additional electrical accessories may switch on as a result. Other electrical components may include high-power users. Because of this, the battery may be drained.

The reading ‘Engine Start/Stop or CLOSED’ can confuse which to activate, but starting the engine should not be mistaken with operating ACC. In order to engage or deactivate accessory mode, push the stop or start button without braking, three times, while simultaneously pressing the radio volume knob once; this is followed by pressing the stop or start button three times.

However, it is safe to leave your automobile in accessory mode. If you wish to utilize other accessories like a radio or a charging phone, you may want to think about it…. As stated in the article, it is important to take basic precautions to ensure the health of the batteries.