Choosing the right battery for a 2018 Ford Focus Mk4 with a Start-Stop system depends on the engine type and its parameters. For most cases, an EFB (Enhanced Flooded Battery) is recommended due to its higher resistance to frequent discharges, which is crucial for vehicles with Start-Stop systems. The key parameters to consider are the battery’s capacity and cold cranking amperes (CCA). For most engine versions, the minimum capacity is 65 Ah, and the CCA is 650 A. Exceptions include the more powerful 2.0 EcoBlue engines, requiring a capacity of 70–75 Ah and a CCA of up to 760 A.
Examples of suitable battery models include Bosch S4 E07, Exide EL652, and Varta D54 for smaller engines, while Bosch S4 E08, Exide EL700, or Varta E45 are suitable for the 2.0 EcoBlue engines. It is essential to note that the battery height in the Ford Focus Mk4 should not exceed 175 mm, which might limit your options. If in doubt, consult manufacturers’ catalogs to ensure compatibility with your vehicle.
Interestingly, EFB batteries are a relatively new solution, designed as a compromise between traditional lead-acid batteries and more advanced, expensive AGM batteries. This means they are more affordable while still offering good performance and durability. Additionally, consider the operating conditions of your vehicle – if you frequently drive in cold climates, choose a battery with a higher CCA to make starting the engine easier.
Remember, selecting the right battery is an investment that ensures your car’s reliability in daily use. Pay attention not only to technical specifications but also to the manufacturer’s reputation and warranty provided.
Ford Focus in version Mk4 is produced from 2018. Below we present the specifications of batteries suitable for specific engines.
Basic parameters of batteries suitable for Ford Focus (2018-):
| Layout | Terminal types | Base hold-down |
|---|---|---|
| 0 – positive on the right side | 1 | B13 |
Ford Focus Mk4 – petrol engines:
- 1.0 EcoBoost (63 kW) – with Start-Stop
- 1.0 EcoBoost (74 kW) – with Start-Stop
- 1.0 EcoBoost (92 kW) – with Start-Stop
- 1.0 EcoBoost Hybrid (114 kW) – with Start-Stop
- 1.0 EcoBoost Hybrid (92 kW) – with Start-Stop
- 1.5 EcoBoost (110 kW) – with Start-Stop
- 1.5 EcoBoost (134 kW) – with Start-Stop
- 2.3 EcoBoost ST (206 kW) – with Start-Stop
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 EFB S4 E07 | 65 Ah 650 A | 278x175x175 mm | More |
| Exide EFB EL652 | 65 Ah 650 A | 278x175x175 mm | More |
| Halfords Advanced EFB 100 | 65 Ah 650 A | 277x175x175 mm | More |
| Lucas Fusion EFB LE100 | 65 Ah 650 A | 278x175x175 mm | More |
| Varta Blue Dynamic EFB D54 | 65 Ah 650 A | 278x175x175 mm | More |
For the Ford Focus Mk4 produced from 2018 onwards, equipped with petrol engines such as the 1.0 EcoBoost (63 kW, 74 kW, 92 kW), 1.0 EcoBoost Hybrid (92 kW and 114 kW), 1.5 EcoBoost (110 kW and 134 kW), as well as the high-performance 2.3 EcoBoost ST (206 kW), the correct choice of battery is crucial for reliable operation, especially considering the demands of Start-Stop and hybrid systems. These engines are all designed with modern efficiency and emission standards in mind, which means that the battery must support frequent engine restarts and the power requirements of advanced onboard electronics.
For these particular petrol and hybrid engine variants, a battery with EFB (Enhanced Flooded Battery) technology is recommended. EFB batteries are specifically engineered to handle the higher cycling and increased electrical loads generated by Start-Stop systems, making them ideal for the Ford Focus Mk4 with the engines listed above. The best-fit battery group for these engines is characterized by a capacity of 65 Ah and a cold cranking current of 650 A, ensuring both consistent starting power and reliable operation of vehicle electronics.
In terms of physical dimensions, the suitable batteries are 278 mm (or 277 mm) in length, 175 mm in width, and 175 mm in height. The batteries use layout 0 (left positive terminal), terminal type 1, and are fitted using the B13 mounting system. Examples of compatible EFB batteries include the Bosch S4 EFB S4 E07, Varta Blue Dynamic EFB D54, Exide EFB EL652, Lucas Fusion EFB LE100, and Halfords Advanced EFB 100. All of these models provide the required capacity, power output, and fitment to ensure optimal performance for the listed Ford Focus Mk4 petrol engines.
Ford Focus Mk4 – diesel engines:
- 1.5 EcoBlue (70 kW) – with Start-Stop
- 1.5 EcoBlue (88 kW) – with Start-Stop
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 EFB S4 E07 | 65 Ah 650 A | 278x175x175 mm | More |
| Exide EFB EL652 | 65 Ah 650 A | 278x175x175 mm | More |
| Halfords Advanced EFB 100 | 65 Ah 650 A | 277x175x175 mm | More |
| Lucas Fusion EFB LE100 | 65 Ah 650 A | 278x175x175 mm | More |
| Varta Blue Dynamic EFB D54 | 65 Ah 650 A | 278x175x175 mm | More |
For the Ford Focus Mk4 equipped with the 1.5 EcoBlue diesel engines (70 kW and 88 kW), both featuring Start-Stop technology, it is equally essential to select a battery that meets the specific requirements of these modern diesel powertrains. Diesel engines generally demand a higher starting current, and the presence of the Start-Stop system further increases the need for a robust and cycle-resistant battery. The recommended choice for these engines is an EFB (Enhanced Flooded Battery), which is designed to support the frequent engine restarts and the sustained power draw from the vehicle’s numerous electronic systems.
The ideal battery specification for the 1.5 EcoBlue diesels matches the group previously mentioned for petrol and hybrid variants: a capacity of 65 Ah and a cold cranking amperage of 650 A. This ensures reliable cold starts, even in adverse weather conditions, and stable operation of all critical systems during repeated stop-start cycles in daily city driving. The physical dimensions required are 278 mm (or 277 mm) in length, 175 mm in width, and 175 mm in height, with a left positive terminal (layout 0), terminal type 1, and B13 mounting configuration.
Among the most suitable batteries for the 1.5 EcoBlue engines are the Bosch S4 EFB S4 E07, Varta Blue Dynamic EFB D54, Exide EFB EL652, Lucas Fusion EFB LE100, and Halfords Advanced EFB 100. Each of these models utilizes EFB technology, delivering the durability and performance required by the Start-Stop-equipped diesel engines of the Ford Focus Mk4. Their compatibility in terms of electrical capacity, cold cranking power, and physical fitment ensures seamless integration and dependable operation for both the 70 kW and 88 kW versions of the 1.5 EcoBlue unit.
Ford Focus Mk4 – diesel engines:
- 2.0 EcoBlue (110 kW) – with Start-Stop
- 2.0 EcoBlue ST (140 kW) – with Start-Stop
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 EFB S4 E08 | 70 Ah 650 A | 278x175x190 mm | More |
| Exide EFB EL700 | 70 Ah 720 A | 278x175x190 mm | More |
| Halfords Advanced EFB 096 | 75 Ah 700 A | 278x175x190 mm | More |
| Lucas Fusion EFB LE096 | 70 Ah 650 A | 278x175x190 mm | More |
| Varta Blue Dynamic EFB E45 | 70 Ah 650 A | 278x175x190 mm | More |
| Varta Blue Dynamic EFB N70 | 70 Ah 760 A | 278x175x190 mm | More |
For the more powerful diesel options in the Ford Focus Mk4 range, specifically the 2.0 EcoBlue (110 kW) Start-Stop and the 2.0 EcoBlue ST (140 kW) Start-Stop engines, choosing the right battery is even more critical. These engines not only generate higher power but also place greater demands on the vehicle’s electrical system, especially given the inclusion of Start-Stop technology. The higher displacement and increased compression ratios typical of 2.0-liter diesels mean that a battery with higher capacity and starting power is necessary to ensure reliable performance, particularly during cold starts and frequent restart cycles in urban traffic.
For both the 2.0 EcoBlue and 2.0 EcoBlue ST engines, the recommended battery type remains EFB (Enhanced Flooded Battery), which is built to endure the intensive cycling associated with advanced Start-Stop systems. However, the optimal battery specification for these engines is slightly elevated compared to the smaller petrol and diesel variants. Specifically, batteries with a capacity of 70 to 75 Ah and a cold cranking current ranging from 650 to 760 A are advised. This increased capacity and higher cranking amperage provide the extra power needed for the robust starting requirements of the larger diesel engines and help support the various high-consumption electronic systems found in these models.
The appropriate batteries for the 2.0 EcoBlue engines share the same physical dimensions as those used for the 1.5 EcoBlue and the petrol models: 278 mm in length, 175 mm in width, and 190 mm in height, with a left positive terminal (layout 0), terminal type 1, and B13 mounting. Among the most suitable EFB batteries are the Bosch S4 EFB S4 E08, Varta Blue Dynamic EFB E45 and N70, Exide EFB EL700, Halfords Advanced EFB 096, and Lucas Fusion EFB LE096. These options provide the necessary combination of durability, high starting power, and compatibility for the 2.0 EcoBlue diesel engines, ensuring dependable operation under all driving conditions.
FAQ – Ford Focus battery
What type of car battery does the Ford Focus Mk4 (from 2018) require?
The Ford Focus Mk4 (from 2018) typically uses an AGM (Absorbent Glass Mat) or EFB (Enhanced Flooded Battery), depending on whether the vehicle is equipped with Start-Stop technology.
What is the recommended battery size for the Ford Focus Mk4 (from 2018)?
The recommended battery size for the Ford Focus Mk4 (from 2018) is most commonly the 096 or 027 battery code, which refers to standard UK battery sizes suitable for this vehicle.
Can I use a traditional lead-acid battery in my Ford Focus Mk4 (from 2018) with Start-Stop technology?
No, it is not recommended to use a traditional lead-acid battery if your Ford Focus Mk4 (from 2018) has Start-Stop technology. You should use an AGM or EFB battery designed specifically for Start-Stop systems to ensure proper function and longevity.
How do I know if my Ford Focus Mk4 (from 2018) needs an AGM or EFB battery?
If your Ford Focus Mk4 (from 2018) is equipped with Start-Stop technology, you should use an AGM or EFB battery as specified in your owner’s manual. If your vehicle does not have Start-Stop, a standard lead-acid battery may be appropriate, but AGM or EFB options are still recommended for better performance.
What is the average lifespan of a battery in the Ford Focus Mk4 (from 2018)?
The average lifespan of a quality battery in the Ford Focus Mk4 (from 2018) is typically between 4 and 6 years, depending on usage, climate, and whether the vehicle is regularly driven.
Do I need to reprogram my Ford Focus Mk4 (from 2018) after changing the battery?
Yes, after replacing the battery in your Ford Focus Mk4 (from 2018), it is often necessary to reset or reprogram the vehicle’s Battery Management System (BMS) to ensure optimal charging and battery health.
If you’re still unsure which battery fits your Ford Focus , or if you want to help others in their selection, please send us a photo of your current battery in the comment section at the bottom of the page. You can also send the picture to contact@whatbattery.co.uk (we will place it in the comments to also help other users). Be sure to specify the car model, year, type, as well as the engine capacity and power. We’ll do our best to assist you!