S4 Battery Overview | Platinum International Limited
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Bosch Battery S4

Bosch Batteries are some of the most respected car batteries in the world. The Bosch Battery S4 meets electrical demands of a wide range of vehicles, ensuring a dependable supply of power to keep the energy consuming components working properly at all times

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.

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.

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 cycle 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.

EFB technology in the Bosch S4 EFB battery
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.


On battery replacement, it is important to install EFB 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.


Maintenance free

high performance

Long service life

Good, reliable Bosch quality

15% more cold-starting power

20% increased service life

Safely ensures the energy supply of a medium convenience features in a vehicle

Permanently meets the high requirements of the international auto manufacturers regarding electrical values

Suitable for most passenger vehicles

Strong performance against corrosion

Corrosion 97% of the market