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How to live to the battery without recharging — examination

For how long you can leave your car, then it is guaranteed to start? Experts “Behind the wheel” found the name of the main “energolesprom”, compared to the real loss data of car manufacturers and made recommendations for drivers.Alexey Revin “driving”ExpertMichael Kolodochkin “driving”Expert

Rules of the daily supply

Sometimes that is the absolutely perfect car for a long time is laid up. And after a while may drain the battery below the “waterline”. No one knows when it will happen. Try to figure?

Just specify that the leakage current of the battery is not taken into account: they are too small in comparison with the capabilities of the main energofinprom. The main one is the on-Board electronics of the car.

Controllers constantly expend energy, and appetite changes from brand to brand. So we sent requests to representative offices of automobile companies explain, they say, what is the current consume of the machine is at rest.

The data obtained, we present below the article — instead of PostScript.

The protection does not sleep

Another energotamir — additional security alarm, which by definition have to stay awake.

The most voracious are satellite system. So, ARKAN Control consumes 40 to 60 mA, ARKAN Satellite — all 60 mA.Current consumption alarm and telemetry complexes in the resting (parked) is equal to 6-15 mA. Appetite depends on the configuration of the specific device and user preferences.

For example, security complex StarLine E96 in rest mode “eats” 6 mA, and BT B96 StarLine 2CAN+GSM GPS 2LIN (maximum configuration with integrated main unit GSM+BLUETOOTH interface and GPS antenna + GLONASS) — 14,6 mA.

In any case, even the most complex electronic “secret police”, including systems with two way communication, do not consume more than 80 mA.

Higher consumption is almost always caused by incompetent system connection to the vehicle.

And we?

Proclaimed not a sin to check in practice, more precisely on the editorial cars. Alternately, each of them detachable terminal on the battery and plug in the circuit the ammeter. Then put the car on guard, and observe how changing the readings in time. The results of our measurements in table.

The steady-state current was within the expected range — tens of milliamps. But transients all cars differ quite strongly. Surprised the figures of Vesta, and especially Cobalt. However, after a while they came back to normal.

But the findings were in line with those reported by representatives of corporations. When the calculations can navigate about 30 mA for machines without additional signaling and 100 mA for vehicles with the fancy electronic means against stealing.

Tips and warnings

A few tips for those who want to test the appetite of his car. On disconnecting the battery terminals the car to react badly. In the best case they have reset the clock and audio system.

In the worst case the machine may refuse to start, considering your actions unauthorized intervention (however, it is peculiar only to some “advanced” models, which all stuff need to go to the service). In addition, many machines will scream offline alarm.

To measure fit simple tester. So as not to burn it, make sure you switch to the measurement mode current of 10 A. If the measurements you found that the current consumption does not want to fall to tens of milliamperes for fault.

The kidnappers electricity can be a variety of tuning devices, such as audio amplifiers, trip computers and even a scanner ELM327, permanently plugged into the OBD.

How much will stretch?

So how much will the battery last without recharging? Accurate to seconds are not taken to identify, but roughly count up.

For example, installed in the car battery of 70 amp-hours and current consumption is 20mA (or 0.02 A). Divide one another — we get 3500 hours. But to start the machine the battery needs solid energy at least a dozen amp-hours need to keep. Then there will be 3000 hours, or approximately four months. If the current consumption is 100 mA and the battery is not fresh, it is already week three or four the car to let fail. Well, if it’s cold, that after ten days the Parking lot of a frozen battery may not be able to start the engine.

In real life the battery will last longer. These 70 Ah say only that the battery can give current of 3.5 A for 20 hours. But the real dependence of battery capacity on the current is exponential in nature: the smaller the discharge current, the higher the capacity and Vice versa.

How does it work? Imagine that the battery is a glass filled with drink with ice. While you languidly SIP a drink through a straw, the ice slowly melts, helping to “stretch pleasure.” It behaves as a battery with a low current consumption. Is it worth it to make a powerful gulp, the drink will end immediately, as happens when a large current.

In short, the battery with low current consumption will last about twice longer than follows from the calculations. An optimistic calculation shows that under favorable circumstances the car can last six months or more.

At statement of machine on protection current consumption can jump up to several amperes — actuate the actuators of the locks. Perhaps the tester is configured to measure in milliamps and will withstand this load, but during the measurement it is better not to risk it and when locking the car momentarily short-circuiting its terminals, allowing a large current to flow directly. Below is the results of measurements on drafting machines:

Consumption current, And




Chevrolet Cobalt


0,24 (1 min) 0,01 (15 min.)

Ford Focus


0,02 (18 min.)

Nissan Almera


0,01 (20 min.)

VW Caddy


Of 0.02 (2 min.)

Lada Vesta


0,07 (1 min) 0,03 (30 min.)

Current consumption declared by producers:

  • Audi: the average current in idle state electronics, the so-called Busruhe when all of the digital bus and the blocks are “asleep”, depending on the model of 30-50 mA. While stationary, some systems check the condition of the machine, and the current is increased, and when returning to rest down again.
  • Citroen: after the car is “asleep”, the consumption current is 20-30 mA. This figure does not depend on the Parking time.
  • Jaguar/Land Rover: as follows from the manufacturer’s documentation, the current state of rest must not exceed 30 mA. In reality, he is 5-15 mA. During Parking, the figure can fluctuate due to the fact that periodically checks the control units (the height of the suspension, anti-lock braking system and others).
  • Kia: side the grid goes into sleep mode after 10-20 minutes after switching off the ignition and closing the locks. Thereafter, the current does not exceed 50mA.
  • Mitsubishi: after disconnecting consumers exchange data tire lasts about 10 minutes, then the car goes into rest mode. Current consumption in this mode is in the range of 10-20 mA, depending on the type of vehicle.
  • Skoda: the quiescent current, if the vehicle is repaired – no more than 40-50 mA. The time during which the value can stabilize up to 40 minutes (usually 5-10 minutes). For sequential power-off control unit responds to the control unit onboard network of the CSM.
  • Volkswagen: approximately 10 to 20 minutes after the vehicle protection electronics enters the power saving mode. Current consumption depends on the model and configuration and does not exceed 40 mA.
  • Volvo: pkW current current in sleep mode does not exceed 30 mA. Under normal conditions, regardless of time of Parking, the current is not changing. If using the application, the VOC (Volvo On Call) to apply to the car, it will be a short-term increase, while TEM (Telematics module, through which Volvo On Call communicates with the machine) is in active mode.
  • Lada: current consumption technically perfect vehicle at rest — two minutes after arming or 16 minutes after the ignition is turned off and the last impact on the vehicle (e.g. door closing), averages 20 mA. The current does not change if no external impact on the vehicle.
  • Want to prolong the life of the battery? Take care of her. In our store are available charger!

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