The Bosch S4 battery series represents a perfect balance between performance, reliability, and affordability. Designed to meet the demands of modern vehicles, Bosch S4 batteries are manufactured using advanced PowerFrame® grid technology, which ensures optimal current flow, improved corrosion resistance, and extended service life. They are ideal for drivers who need a dependable battery for everyday use without the higher cost of premium or AGM technologies. The S4 range covers a wide selection of European passenger cars, including compact, mid-size, and some light commercial vehicles. Bosch places great emphasis on consistent cold-start performance and stable power supply for electronic systems, making the S4 a solid mid-range option in the brand’s lineup.
The Bosch S40 01 model, part of the S4 family, is a 12-volt lead-acid battery with a capacity of 44 Ah and a maximum cold cranking current of 440 A. This performance level makes it well-suited for small and medium-sized European cars, where reliable cold starts and stable voltage are essential. With dimensions of 207 mm in length, 175 mm in width, and 175 mm in height, this battery corresponds to the LB1 (also known as H4) European size class. The slightly reduced height of 175 mm indicates that it is designed for vehicles with limited battery compartment space—common in compact cars or models where a lower battery profile is required for proper fitment. It uses the standard European polarity layout (layout 0, positive terminal on the right) and terminal type 1, which ensures compatibility with most vehicles designed for this form factor. The B13 base hold-down provides secure mounting in typical European vehicles.
Like all Bosch S4 models, the S40 01 is a conventional flooded lead-acid battery. It is not designed for vehicles equipped with start-stop systems—such systems require EFB or AGM technologies due to their enhanced cycling durability. However, for cars without start-stop functionality, this model delivers excellent reliability, providing long-lasting starting power and consistent performance even under changing temperatures. The internal grid design and robust separators reduce the risk of short circuits and improve charge acceptance, which helps maintain stable voltage over time.
In terms of performance, the Bosch S40 01 sits between the more basic Bosch S3 S30 01 (41 Ah, 360 A) and the higher-spec Bosch S5 S50 01 (52 Ah, 520 A). Compared to the S3, it offers a stronger starting current and better energy reserves, making it more suitable for vehicles with a moderate number of electrical consumers. On the other hand, the S5 provides higher power output but at a higher price, which may be unnecessary for smaller vehicles. When compared with competitors such as the Varta Blue Dynamic B18 (44 Ah, 440 A), the Bosch S40 01 performs at nearly identical specifications, reflecting the shared engineering heritage between Bosch and Varta products. It also stands up well against the Exide Excell EB442 (44 Ah, 420 A), offering slightly higher cranking power, which can be particularly beneficial in colder climates.
This battery is a popular choice for cars using the 063 battery code, which includes models from Ford, Opel, Volkswagen, Peugeot, and Fiat. The Bosch S40 01 provides the reliability of a premium brand with solid technical parameters and a long service life. Its compact design, high cold-start capacity, and trusted Bosch quality make it a dependable option for drivers seeking a maintenance-free battery for everyday use. With its European dimensions and standard fittings, it ensures an easy installation and reliable operation across a wide range of popular European vehicles.
