What are cars with Start-Stop technology?

Cars with Start-Stop technology automatically turn off the engine during short stops and restart it as soon as the driver resumes driving.

This shutdown occurs, for example:

• At traffic lights
• In traffic jams
• During short stops in urban traffic

This system is designed for brief stops and aims to save fuel and reduce pollutant gas emissions.

Even with the engine turned off, the vehicle continues to consume electrical energy to keep essential systems operating, such as electronic control units, lighting, multimedia systems, electric steering, and safety devices.

This means the battery is under constant demand, even when the engine is not running.

What are the characteristics of a Start-Stop battery?

The battery of a Start-Stop vehicle must be designed to withstand a much higher level of stress than a conventional battery.

The main required characteristics are:

• High resistance to frequent charge and discharge cycles
• Ability to maintain stable voltage at rest
• Fast recharge acceptance
• Predictable operation even after multiple starts throughout the day

A conventional battery was not developed for this type of use and tends to fail quickly when installed in Start-Stop vehicles.

Why does Start-Stop require a different battery?

Because the system significantly increases the number of daily engine starts.

While a conventional vehicle performs only a few starts per trip, a Start-Stop car may turn the engine off and on dozens of times during a single urban journey. This operation results in:

• Greater electrical stress
• Constant energy consumption with the engine off
• Fast and repeated recharging

When the battery is not suitable, the Start-Stop system may be automatically deactivated, warning lights may appear on the dashboard, and battery lifespan is drastically reduced.

This behavior is directly related to issues such as frequent battery discharge, discussed in the content about why the battery discharges quickly.

Which battery is ideal for Start-Stop?

The ideal batteries for Start-Stop systems are EFB or AGM, depending on the vehicle’s level of electrical demand.

What are Tudor batteries for Start-Stop vehicles like?

Batteries developed for vehicles with Start-Stop technology must meet a much higher level of demand than conventional batteries. With this in mind, Tudor develops specific product lines for this type of application, ensuring stable electrical performance, greater cycle resistance, and compatibility with modern systems.

Tudor EFB Batteries

Tudor’s Automotive EFB line was developed to serve vehicles with simple Start-Stop systems, commonly found in urban applications.

EFB technology is an evolution of the conventional battery, designed to withstand:

• A higher number of charge and discharge cycles
• More frequent starts throughout the day
• Better electrical stability in urban use

In Tudor EFB batteries, the plates receive specific treatment and structural reinforcement, improving resistance to wear and increasing reliability in vehicles that frequently turn the engine off and on.

This technology offers a balance between performance, durability, and compatibility for modern cars that demand more from the battery but do not reach the level of an AGM application.

Tudor AGM Batteries

Tudor’s Automotive AGM batteries are recommended for vehicles with advanced Start-Stop systems and high electrical demand.

This technology is mainly applied in vehicles that, in addition to automatic engine shutdown, use:

• Energy regeneration during braking
• A high number of electronic modules
• Intelligent charge management systems

AGM batteries are built with electrolyte absorbed in fiberglass mats, which allows:

• Greater resistance to intense starting cycles
• Much faster charge acceptance
• Superior electrical stability even under severe use

These characteristics make Tudor AGM batteries the most robust technology for Start-Stop vehicles with a higher level of demand.

Summary,Vehicles with Start-Stop technology require specific batteries developed to support:

• Frequent starts
• Continuous electrical consumption
• Fast recharging
• Voltage stability

In this scenario:

• Conventional batteries are not recommended
• EFB batteries meet simple Start-Stop systems
• AGM batteries meet advanced Start-Stop systems

Choosing the correct technology is essential to ensure proper Start-Stop operation and avoid premature battery wear.

To explore this and other topics further, visit the Tudor blog and check out technical content on battery technologies, correct specification, and service life.

If there are still doubts, Tudor’s specialized technical support can guide you in choosing the ideal battery for your vehicle and usage pattern.