Drivers with stop start car battery technology are paying the price for fitting the wrong kind of battery as they don’t realise that cars featuring start-stop technology need specialist equipment, especially batteries.

Frequently, standard lead acid batteries are bought for start-stop cars then fail relatively quickly because they aren’t up to the job they’ve been bought for.

What is stop-start technology?

Start-stop is a system on most modern cars that cuts the engine when the car is stationary, in order to reduce fuel consumption and emissions. The engine starts again when the clutch is engaged or the brake is released, or when the driver is ready to move again.

How does stop-start work?

The system uses a computer to detect when the car is stationary or the car is out of gear, at which point it halts fuel delivery and spark to the engine. The ignition starts again when the car begins moving or the clutch is pressed.

Nearly two thirds (60 per cent) of the cars sold in Europe now have either start-stop or energy recuperation technology.

Start-stop is estimated to cut fuel use by between 5% and 10%. Energy recuperation harvests the kinetic energy that’s usually wasted as a car slows down.

But in order for these smart technologies to work, cars need to have specialist Absorbent Glass Mat (AGM) and Enhanced Flooded Batteries (EFB).

Why do start-stop vehicles require different batteries?

Absorbent Glass Mat (AGM) and Enhanced Flooded Batteries (EFB) last longer than standard lead acid batteries. This is because they’re designed to retain sufficient charge to be strong enough to power a car’s many electrical systems such as the windscreen wipers, air conditioning and sound system while the engine is turned off. They must also be capable of starting a vehicle multiple times in any journey where traditionally the vehicle would have been started only once. A vehicle may stop 20 times during a short journey, for example in traffic, at traffic lights etc. This places a much higher and altogether different energy demand on the battery in a start-stop vehicle compared to non start-stop vehicles which are usually only started once on the same journey. The battery therefore must be far more robust.

When choosing an AGM / EFB battery for your start-stop vehicle it pays to choose a quality battery that is trusted worldwide by drivers and car manufacturers alike.

VARTA Silver Dynamic AGM: The start-stop benchmark

All new vehicles are equipped with a battery that caters for today’s increasing energy requirements and in Europe 8 out of 10 newly manufactured start-stop cars equipped with an AGM battery are fitted with a VARTA Silver Dynamic AGM.

VARTA AGM batteries are classified as original spare parts meaning they are manufactured according to OE (Original Equipment) specifications, which ensures a like-for-like replacement for the start-stop battery already on your vehicle, with the same performance and lifetime.

Since conventional lead-acid batteries do not meet the high demands of modern vehicles VARTA recommends it is always necessary to always replace AGM batteries with AGM batteries.

Varta Car Battery

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