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Press release #Mobility Aftermarket
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Bosch 12V auxiliary batteries: a helping hand for starter batteries in modern, energy-hungry passenger cars

Reliable auxiliary batteries with AGM technology for use in dual battery systems

  • New auxiliary batteries complement Bosch’s extensive starter-battery range
  • AGM technology for high cycle stability and long service life
  • Reliable performance even under high loads
Nico Krespach

Nico Krespach

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Nico Krespach

Nico Krespach
Spokesperson Automotive Aftermarket (test equipment, diagnostic solutions, Bosch Classic, locations Automotive Aftermarket Germany)

Karlsruhe, Germany – To operate new safety systems, help satisfy growing demand for convenience functions, and, last but not least, run start-stop systems, today’s passenger cars need much more power. All this pushes even the most powerful starter batteries to their limits. As an additional source of power, cars equipped with a particularly large number of electrical consumers are therefore increasingly using dual battery systems featuring an auxiliary battery. Bosch has now augmented its product range with its S5 AX auxiliary battery series. Integrating particularly reliable and powerful AGM technology, these backup batteries have been specially developed for combustion engine vehicles featuring dual battery systems. They should not be confused with the significantly larger backup batteries in vehicles with electrical or hybrid powertrains.

Reliable performance even under high loads

In batteries with AGM (absorbent glass mat) technology, special fiberglass mats placed between the batteries’ lead plates bind the acid. As the resulting low internal resistance permits fast reactions between the acid and the plate material, the battery can provide more energy. Thanks to this technology, the Bosch S5 AX auxiliary battery offers reliable performance even at high peak loads.

This stabilizes the 12V electrical system and permits extended fuel-saving start-stop phases, as a safe start is guaranteed even when temperatures are extreme and convenience functions are running. With up to four times the cycle stability of conventional starter batteries, Bosch auxiliary batteries offer a longer service life. Their optimized grid design also ensures very good charge acceptance as well as continuously high starting power and corrosion resistance. Moreover, the S5 AX battery’s special cover design means it is completely maintenance-free.

In addition to the complete range of starter batteries for all vehicle segments, Bosch now also offers dealers and workshops high-performance auxiliary batteries with AGM technology, which are increasingly being used especially in premium cars.

Readers’ contact:
Robert Bosch GmbH
Automotive Aftermarket
Phone +49 9001 942-010
E-mail: Kundenberatung.Kfz-Technik@de.bosch.com

Contact person for press inquiries:
Nico Krespach
Phone +49 721 942-2209

The Mobility Aftermarket division (MA) provides the aftermarket and repair shops worldwide with modern diagnostic and repair shop equipment and a wide range of spare parts – from new and exchange parts to repair solutions – for passenger cars and commercial vehicles. Its product portfolio includes products made as Bosch original equipment, products developed in-house and specifically manufactured for the aftermarket, as well as services. About 16,000 associates, as well as a global logistics network, ensure that spare parts reach customers quickly and on time. MA supplies testing and repair-shop technology, diagnostic software, service training, and information services. In addition, the division is responsible for the “Bosch Service” repair-shop franchise, one of the world’s largest independent chains of repair-shops, with some 13,000 workshops, and more than 1,000 “AutoCrew” partners in over 100 countries. In addition, with Bosch Classic, MA supports owners of classic cars with a wide range of spare parts and services.

Additional information can be accessed at www.boschaftermarket.com

The Bosch Group is a leading global supplier of technology and services. It employs roughly 429,000 associates worldwide (as of December 31, 2023). The company generated sales of 91.6 billion euros in 2023. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology. With its business activities, the company aims to use technology to help shape universal trends such as automation, electrification, digitalization, connectivity, and an orientation to sustainability. In this context, Bosch’s broad diversification across regions and industries strengthens its innovativeness and robustness. Bosch uses its proven expertise in sensor technology, software, and services to offer customers cross-domain solutions from a single source. It also applies its expertise in connectivity and artificial intelligence in order to develop and manufacture user-friendly, sustainable products. With technology that is “Invented for life,” Bosch wants to help improve quality of life and conserve natural resources. The Bosch Group comprises Robert Bosch GmbH and its roughly 470 subsidiary and regional companies in over 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. Bosch’s innovative strength is key to the company’s further development. At 136 locations across the globe, Bosch employs some 90,000 associates in research and development, of which nearly 48,000 are software engineers.

Additional information is available online at www.bosch.com, www.iot.bosch.com, www.bosch-press.com.

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