Please check battery type, dimensions, terminal polarity, and terminal type against the battery being replaced. Even if the battery shows as being compatible with your vehicle, there can sometimes be more than one option depending on individual vehicle specifications. Unfortunately, we cannot guarantee vehicle fitment using vehicle details alone.
The S4 EFB : For passenger cars with start/stop system
The S4 EFB (Enhanced Flooded Battery) satisfies all requirements that lie somewhere between conventional starter batteries and the AGM.
The S4 EFB is designed for vehicles with start/stop system. Its deep cycle resistance ensures that sufficient energy is available at all times for restarting the vehicle. Even when a large number of energy consumers are in operation in the vehicle during the stop phase, it maintains its excellent starting performance.
Advantages
- Longer service life and double the deep cycle resistance of conventional starter batteries
- More reliable starting even in extreme temperatures and with a large number of electrical devices
- Outstanding charge acceptance and good resistance to short-haul operations
- With additional polyester scrim between plate and separator
- Leak-proof and tilt-resistant up to 55°
- First-class quality from Bosch
- Absolutely maintenance-free
EFB technology: Performance that exceeds standards
In EFB technology, the positive plate is coated with so-called polyester scrim. This gives the active material additional grip on the plate. Deep cycle resistance is then greater than in traditional batteries, and the battery also remains ready for operation when subject to strong vibrations.
Bosch EFB batteries at a glance:
If battery replacement is needed, it is important to install EFB or AGM batteries again in passenger cars that were fitted with this type of battery when new. Otherwise, the function and positive effects of the start/stop system would be impaired. The battery service life would also be reduced.
When is an upgrade from conventional to EFB worthwhile?
- Does the vehicle have extensive electronic equipment?
- Is the vehicle equipped with additional, retrofitted electronic devices?
- Are devices, e.g. mobile phones, often charged in the vehicle?
- Do you often drive under extreme weather conditions?
- Do you often drive short distances or are often in traffic queues?
- Would you be prepared to pay more for a product with a better long-term benefit (service life)?
If you have answered any of these questions with “yes”, an upgrade to an EFB battery is recommended.
More power right from the start: Advantages of PowerFrame® technology
Rigid grid frame
Prevents grid growth and corrosion at the edges and so damage to the separator, or short circuits caused by the grid making contact with the negative plate. PowerFrame® patented grid technology is up to 66% more durable and more corrosion-resistant than other grid designs.
Patterned for Power
The PowerFrame® grid design provides superior cranking power with up to 70% better electrical flow than other grid technologies.
Stamped grid
The rigid, precise structure ensures excellent adhesion of the active material to the grid and permits low-resistance, rapid charging and discharging of the battery. In contrast to conventional grids, there is no brittleness arising from mechanical deformation during production.
Clean Construction
PowerFrame® manufacturing uses 20% less energy and produces 20% fewer greenhouse gases than other manufacturing methods.
Optimum grid structure
More lead is applied to the areas subject to a higher load: the grid is more hard-wearing and resistant to corrosion.
Grid designed for optimum flow
In this innovative design, the grid bars lead directly to the plate link. The low flow resistance ensures optimum conductivity and the fastest possible supply of power to the electrical device.
The SAE J240 (75 °C) life test shows that
The stamped grid (right) exhibits minimal corrosion with virtually no loss of conductivity. In the grid on the left, the material between the alloy grains has suffered corrosion, resulting in a weak flow of current and a shorter service life.
PowerFrame® in comparison with a conventional grid
