Yellow

The OPTIMA YellowTop YT U 4.2 is a revolutionary high-performance AGM battery that combines the maximum starting power of a starter battery with the cycle stability of a supply battery thanks to the patented SPIRALCELL TECHNOLOGY®. With a nominal voltage of 12 V, a high capacity of 55 Ah and an enormous cold start current, it is the ultimate solution for modern vehicles with extensive electrical equipment, commercial vehicles in demanding continuous use or off-road vehicles with winches and additional lighting.Highlights at a glanceDual-purpose functionality: Maximum starting power and excellent cycle stability in one battery.SPIRALCELL TECHNOLOGY®: Unique spiral cell design for extreme vibration resistance and a longer service life.High cycle stability: Ideal for vehicles with many electrical consumers and for repeated deep discharges.Absolutely maintenance-free and leak-proof: The sealed AGM construction allows installation in almost any position.Versatile connections: Equipped with standard round terminals (SAE) and US side terminals (GM) for maximum compatibility.Maximum performance for demanding vehiclesThe OPTIMA YellowTop YT U 4.2 was developed specifically for the extreme requirements of modern vehicles, which go far beyond mere starting. It is the ideal choice for vehicles with sophisticated sound systems, auxiliary headlights, winches, hydraulic systems and other energy-intensive consumers. The YellowTop also proves its superior performance and durability in vehicles with seasonal use, in demanding short-distance operation or in construction vehicles.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high purity lead spirals are used, which are wrapped in a glass fibre fleece (AGM). This compact and extremely stable design minimises internal resistance, resulting in outstanding starting power, faster charging and unsurpassed vibration resistance. This technology makes the YellowTop the perfect hybrid solution for starting and supply.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for tough use. Its sealed construction not only prevents acid leakage but also evaporation, making it absolutely maintenance-free. The rugged construction made of impact-resistant polypropylene and up to 15x higher vibration resistance compared to conventional batteries ensure that vibrations and shocks in demanding driving conditions cannot harm the battery. Features  ModelOPTIMA YellowTop YT U 4.2 TechnologyAGM Spiralcell Nominal voltage (V)12 Capacity (Ah)55 Cold start current EN (A)765 Dimensions (L x W x H in mm)254 x 175 x 200 ConnectionSAE car terminal (positive terminal left) Weight (kg)approx. 19.9  FAQs about the OPTIMA YellowTop batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY®?The spiral cell technology ensures an extremely robust and vibration-resistant internal structure, a very low internal resistance for high starting currents and excellent cycle stability. It combines the advantages of a starter battery with those of a deep-cycle battery in one product.What is the difference between OPTIMA YellowTop and RedTop?YellowTop: A dual-purpose battery (starting and supply). It is ideal for vehicles with high energy requirements due to additional consumers (e.g. winch, large hi-fi systems), as it can withstand deep discharges. RedTop: A pure high-performance starter battery for maximum starting power. It is the right choice when the starting process is the main load and there are no deep discharge cycles.What is the advantage of the double connections (SAE & GM)?The combination of the top-mounted standard round terminals (SAE) and the side threaded terminals (GM standard) offers maximum flexibility. You can connect the main vehicle cables to one type of terminal and accessories such as winches, compressors or hi-fi amplifiers simply and tidily to the second set of terminals.Which charger do I need for this AGM battery?For AGM batteries, especially for OPTIMA batteries, a modern, microprocessor-controlled charger is recommended, which has a special charging profile for AGM batteries. This ensures a complete and gentle charge and maximises service life.How should this lead-acid battery be disposed of?Lead acid batteries contain environmentally hazardous substances and must not be disposed of in household waste. You can return your old battery free of charge to any retailer who sells new batteries or to municipal recycling centres to ensure proper disposal.

The OPTIMA YellowTop YT S 2.7 J is a revolutionary high-performance AGM battery that combines the maximum starting power of a starter battery with the cycle life of a supply battery thanks to its patented SPIRALCELL TECHNOLOGY®. With a nominal voltage of 12 V, a capacity of 38 Ah and a high cold cranking current, it is the ultimate solution for modern vehicles with extensive electrical equipment, powerful hi-fi systems or demanding off-road accessories in a compact form factor.Highlights at a glanceDual-purpose functionality: Maximum starting performance and excellent cycle life in a single battery.SPIRALCELL TECHNOLOGY®: Unique spiral cell design for extreme vibration resistance and longer service life.High cycle life: Ideal for vehicles with many electrical consumers and for repeated deep discharges.Absolutely maintenance-free and leak-proof: The sealed AGM design allows installation in almost any position.Compact design: High performance for vehicles with limited installation space, especially Asian models.Maximum performance for demanding vehiclesThe OPTIMA YellowTop YT S 2.7 J has been purpose-designed for the extreme demands of modern vehicles, which go far beyond simply starting the engine. It is the ideal choice for vehicles with sophisticated sound systems, additional headlights, winches and other energy-intensive consumers. The YellowTop also demonstrates its superior performance and longevity in vehicles used seasonally or for frequent short trips that put a heavy strain on conventional batteries.Superior SPIRALCELL TECHNOLOGY®The heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, highly pure lead spirals are used and wrapped with glass fibre fleece (AGM). This compact and extremely robust design minimises internal resistance, resulting in outstanding starting power, faster charging and unsurpassed resistance to vibration. This technology makes the YellowTop the perfect hybrid solution for starting and supplying.Built for the toughest conditionsThe OPTIMA YellowTop is designed for tough applications. Its sealed construction not only prevents acid leakage, but also evaporation, making it completely maintenance-free. The robust housing made from impact-resistant polypropylene and its up to 15 times higher vibration resistance compared to conventional batteries ensure that vibration and shocks in demanding driving conditions cannot harm the battery. Features  ModelOPTIMA YellowTop YT S 2.7 J TechnologyAGM Spiralcell Nominal voltage (V)12 Capacity (Ah)38 Cold cranking current EN (A)460 Dimensions (L x W x H in mm)237 x 129 x 227 ConnectionJIS terminal posts & side connections Weight (kg)approx. 11.8  FAQs about the OPTIMA YellowTop batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY®?The spiral cell technology provides an extremely robust and vibration-resistant internal structure, very low internal resistance for high starting currents as well as excellent cycle life. It combines the benefits of a starter and deep-cycle battery in a single product.What is the difference between OPTIMA YellowTop and RedTop?YellowTop: A dual-purpose battery (starting and supply). It is ideal for vehicles with high energy requirements from additional consumers (e.g. winch, large hi-fi systems), as it can tolerate deep discharges. RedTop: A pure high-performance starter battery for maximum starting power. It is the right choice when starting is the main load and there is no deep discharge cycles.What does the suffix "J" in the model name mean?The letter "J" in the model designation YT S 2.7 J stands for "JIS" (Japanese Industrial Standard). This means that the battery has the narrower, tapered battery posts typically used in Japanese and other Asian vehicle brands.Which charger do I need for this AGM battery?For AGM batteries, especially for OPTIMA batteries, a modern, microprocessor-controlled charger with a special AGM charging profile is recommended. This ensures a complete and gentle charge and maximises battery lifetime.How should this lead-acid battery be disposed of?Lead-acid batteries contain substances harmful to the environment and must not be disposed of in household waste. You can return your old battery free of charge to any dealer selling new batteries or to municipal collection points to ensure proper recycling.

The OPTIMA YellowTop YT R 2.7 J is a revolutionary high-performance AGM battery that combines the maximum starting power of a starter battery with the cycle stability of a supply battery thanks to the patented SPIRALCELL TECHNOLOGY®. With a nominal voltage of 12 V, a capacity of 38 Ah and a high cold-start current, it is the ultimate solution for modern vehicles with extensive electrical equipment, powerful hi-fi systems or demanding off-road accessories. Its extreme vibration resistance and absolutely maintenance-free, leak-proof design make it the first choice for the most demanding applications.Highlights at a glanceDual-purpose functionality: Maximum starting power and excellent cycle stability in one battery.SPIRALCELL TECHNOLOGY®: Unique spiral cell design for extreme vibration resistance and a longer service life.High cycle stability: Ideal for vehicles with many electrical consumers and for repeated deep discharges.Absolutely maintenance-free and leak-proof: The sealed AGM design allows installation in almost any position.Fast recharge: Absorbs charge significantly faster than conventional batteries.Maximum performance for demanding vehiclesThe OPTIMA YellowTop YT R 2.7 J was developed specifically for the extreme requirements of modern vehicles, which go far beyond mere starting. It is the ideal choice for vehicles with sophisticated sound systems, auxiliary headlights, winches, hydraulic systems and other energy-intensive consumers. The YellowTop also proves its superior performance and longevity in vehicles with seasonal use or many short journeys that place a heavy load on conventional batteries.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high-purity lead spirals are used, which are wrapped in a glass fibre fleece (AGM). This compact and extremely stable design minimises plate spacing and internal resistance, resulting in outstanding starting power, faster charging and unsurpassed vibration resistance. This technology makes the YellowTop the perfect hybrid solution for starting and supplying.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for tough applications. Its sealed construction not only prevents acid leakage but also evaporation, making it completely maintenance-free. The robust construction made of impact-resistant polypropylene and the up to 15 times higher vibration resistance compared to conventional batteries ensure that vibrations and shocks cannot harm the battery in demanding driving conditions. Battery features  ModelOPTIMA YellowTop YT R 2.7 J TechnologyAGM Spiralcell Rated voltage (V)12 Capacity (Ah)38 Cold start current EN (A)460 Dimensions (L x W x H in mm)237 x 129 x 227 ConnectionJIS terminals (positive terminal right) Weight (kg)approx. 11.8  FAQs about the OPTIMA YellowTop batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY®?The spiral cell technology ensures an extremely robust and vibration-resistant internal structure, very low internal resistance for high starting currents and excellent cycle stability. It combines the advantages of a starter battery with those of a deep-cycle battery in a single product.What is the difference between OPTIMA YellowTop and RedTop?YellowTop: A dual-purpose battery (starting and supply). It is ideal for vehicles with high energy requirements due to additional consumers (e.g. winches, large hi-fi systems) as it can withstand deep discharges. RedTop: A pure high-performance starter battery for maximum starting power. It is the right choice if the starting process is the main load and there are no deep discharge cycles.What does the suffix "J" in the model name mean?The letter "J" in the model designation YT R 2.7 J stands for "JIS" (Japanese Industrial Standard). This means that the battery has the narrower, conical battery terminals that are typically used in Japanese and other Asian vehicle brands.Which charger do I need for this AGM battery?For AGM batteries, especially for OPTIMA batteries, a modern, microprocessor-controlled charger is recommended, which has a special charging cycle line for AGM batteries. This ensures a complete and gentle charge and maximises the service life.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of with household waste. You can return your old battery to any retailer that sells new batteries or to municipal recycling centres free of charge to ensure that it is recycled properly.

The OPTIMA YellowTop YT S 4.2 is a revolutionary high-performance AGM battery that, thanks to the patented SPIRALCELL TECHNOLOGY®, combines the maximum starting power of a starter battery with the cycle stability of a supply battery. With a nominal voltage of 12 V, a high capacity of 55 Ah and enormous cold-start current, it is the ultimate solution for modern vehicles with extensive electrical equipment, commercial vehicles in demanding continuous use or off-road vehicles with winches and additional lighting.Highlights at a glanceDual-purpose functionality: Maximum starting power and excellent cycle stability in one battery.SPIRALCELL TECHNOLOGY®: Unique spiral cell design for extreme vibration resistance and a longer service life.High cycle stability: Ideal for vehicles with many electrical consumers and for repeated deep discharges.Absolutely maintenance-free and leak-proof: The sealed AGM design allows installation in almost any position.Fast recharge: Absorbs charge significantly faster than conventional batteries.Maximum performance for demanding vehiclesThe OPTIMA YellowTop YT S 4.2 was developed specifically for the extreme demands of modern vehicles, which go far beyond just starting. It is the ideal choice for vehicles with sophisticated sound systems, auxiliary headlights, winches, hydraulic systems and other energy-intensive consumers. Even in vehicles with seasonal use, in demanding short-distance operation or in construction vehicles, the YellowTop proves its superior performance and durability.Superior SPIRALCELL TECHNOLOGY®The heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high-purity lead spirals are used, wrapped in a glass-fibre mat (AGM). This compact and extremely stable design minimises internal resistance, resulting in outstanding starting power, faster charging and unsurpassed vibration resistance. This technology makes the YellowTop the perfect hybrid solution for starting and supplying.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for tough use. Its sealed construction not only prevents acid leakage but also evaporation, making it completely maintenance-free. The robust construction made of impact-resistant polypropylene and the up to 15 times higher resistance to vibration compared to conventional batteries ensure that vibrations and shocks encountered in demanding driving conditions do not harm the battery. Features  ModelOPTIMA YellowTop YT S 4.2 TechnologyAGM Spiralcell Nominal voltage (V)12 Capacity (Ah)55 Cold start current EN (A)765 Dimensions (L x W x H in mm)254 x 175 x 200 ConnectionSAE autopol & side terminals Weight (kg)approx. 19.9  FAQs about the OPTIMA YellowTop batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY®?The spiral cell technology provides an extremely robust and vibration-resistant internal structure, very low internal resistance for high starting currents as well as excellent cycle stability. It combines the advantages of a starter battery with those of a deep-cycle battery in a single product.What is the difference between OPTIMA YellowTop and RedTop?YellowTop: A dual-purpose battery (starting and supply). It is ideal for vehicles with high power requirements due to additional consumers (e.g. winches, large hi-fi systems), as it can withstand deep discharges. RedTop: A pure high-performance starter battery for maximum starting power. It is the right choice if starting is the main load and there are no deep discharge cycles.Is this battery suitable for vehicles with automatic start-stop?Although the YellowTop is very cycle-resistant, it was not specifically developed for the requirements of modern start-stop systems. For vehicles with start-stop technology, batteries with EFB or AGM technology in standard form, which are explicitly designed for this purpose, are recommended.Which charger do I need for this AGM battery?For AGM batteries, especially for OPTIMA batteries, a modern, microprocessor-controlled charger is recommended, which has a special charging curve for AGM batteries. This ensures complete and gentle charging and maximises service life.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of with household waste. You can return your old battery free of charge to any retailer that sells new batteries or to municipal recycling centres to ensure professional recycling.

The OPTIMA YellowTop YT S 2.1 is a revolutionary 6-volt high-performance AGM battery that, thanks to the patented SPIRALCELL TECHNOLOGY®, combines the starting power of a starter battery with the cycle durability of a supply battery. With a nominal voltage of 6 V and a capacity of 38 Ah, it is the ultimate solution for classic vehicles and special applications that have been retrofitted with modern, high-current consumers. Its extreme vibration resistance and absolutely maintenance-free, leak-proof design make it the first choice for the most demanding 6-volt applications.Highlights at a glance6-volt dual-purpose functionality: Offers starting power and cycle durability for classic vehicles with high energy requirements.SPIRALCELL TECHNOLOGY®: Unique spiral cell design for extreme vibration resistance and longer service life.High cycle durability: Ideal for vintage cars with modern hi-fi systems or additional lighting.Absolutely maintenance-free and leak-proof: The sealed AGM design allows installation in almost any position and protects valuable original materials.Fast recharge: Absorbs charge considerably more quickly than conventional 6-volt batteries.Maximum performance for classic vehicles with modern requirementsThe OPTIMA YellowTop YT S 2.1 was purpose-built for the special requirements of 6-volt vehicles that need more than just starting current. It is the ideal choice for vintage cars, hot rods, and tractors equipped with powerful stereo systems, navigation systems, electric fans or other modern consumers. It reliably provides the high current to start the engine and then powers the additional equipment when stationary without losing performance.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high-purity lead spirals are used which are wrapped with a glass fibre fleece (AGM). This compact and extremely robust design minimises internal resistance, resulting in superior starting power, faster charging and unmatched vibration resistance. This technology makes the YellowTop the perfect hybrid solution for demanding 6-volt systems.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for tough use. Its sealed construction not only prevents acid leakage—which is especially important in valuable vintage cars to avoid damage to paint and bodywork—but also evaporation. This makes it absolutely maintenance-free. The up to 15 times higher vibration resistance compared to conventional batteries ensures that vibrations in older vehicles do not harm the battery. Features  ModelOPTIMA YellowTop YT S 2.1 TechnologyAGM Spiralcell Nominal voltage (V)6 Capacity (Ah)38 Cold start current EN (A)460 Dimensions (L x W x H in mm)254 x 90 x 206 ConnectionSAE car pole Weight (kg)approx. 8.9  FAQs on the OPTIMA YellowTop 6V batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY® in a classic car?In classic vehicles, spiral cell technology offers two decisive advantages: Firstly, extreme vibration resistance, which is very useful in older chassis. Secondly, it is completely leak-proof, which protects valuable paint and bodywork from acid damage—a common problem with old wet batteries.What is the difference between the 6V YellowTop and the 6V RedTop?YellowTop (6V): A dual-purpose battery (starting and supply). It is ideal for 6-volt vehicles with additional electrical consumers such as a powerful music system, as it can handle deep discharges. RedTop (6V): A pure high-performance starter battery. It is the right choice if starting is the main load and no significant consumers are operated when stationary.Do I need a special charger for this 6V AGM battery?Yes, it is very important to use a modern, microprocessor-controlled charger that is suitable for both 6 volt and AGM technology. Old, unregulated 6-volt chargers can damage the battery through overvoltage.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of with household waste. You can return your old battery free of charge to any dealer who sells new batteries or to municipal recycling centres to ensure proper disposal.

The OPTIMA YellowTop YT S 5.5 is a revolutionary high-performance AGM battery that combines the maximum starting power of a starter battery with the cycle stability of a supply battery thanks to the patented SPIRALCELL TECHNOLOGY®. With a nominal voltage of 12 V, a very high capacity of 75 Ah and an extreme cold start current, it is the ultimate solution for the most demanding vehicles with enormous energy needs, such as construction vehicles, lorries or heavily modified off-road vehicles.Highlights at a glanceDual-purpose functionality: Maximum starting power and excellent cycle stability in a single battery.SPIRALCELL TECHNOLOGY®: Unique spiral cell construction for extreme vibration resistance and a longer service life.High cycle stability: Ideal for vehicles with many electrical consumers and for repeated deep discharges.Absolutely maintenance-free and leak-proof: The sealed AGM construction allows installation in almost any position.Fast recharging: Absorbs charge significantly faster than conventional batteries.Maximum performance for demanding vehiclesThe OPTIMA YellowTop YT S 5.5 was specifically developed for the most extreme requirements of modern vehicles, which go far beyond mere starting. It is the ideal choice for vehicles with complex sound systems, auxiliary headlights, winches, hydraulic systems and other energy-intensive consumers. Even in vehicles with seasonal use, in demanding short-distance operation or in construction vehicles, the YellowTop demonstrates its superior performance and longevity.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high-purity lead spirals are used, which are wrapped with a glass fibre separator (AGM). This compact and extremely stable design minimises internal resistance, resulting in outstanding starting power, faster recharging, and unsurpassed vibration resistance. This technology makes the YellowTop the perfect hybrid solution for starting and supply.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for hard use. Its sealed design not only prevents acid leakage, but also evaporation, making it absolutely maintenance-free. The robust construction of impact-resistant polypropylene and up to 15 times greater vibration resistance compared to conventional batteries ensure that vibrations and shocks in demanding driving conditions cannot affect the battery. Features  ModelOPTIMA YellowTop YT S 5.5 TechnologyAGM Spiralcell Nominal voltage (V)12 Capacity (Ah)75 Cold start current EN (A)975 Dimensions (L x W x H in mm)325 x 165 x 238 ConnectionSAE autopol & side connections Weight (kg)approx. 26.5  FAQs about the OPTIMA YellowTop batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY®?The spiral cell technology provides an extremely robust and vibration-resistant internal structure, very low internal resistance for high starting currents, as well as excellent cycle stability. It combines the advantages of a starter battery with those of a deep-cycle battery in a single product.What is the difference between OPTIMA YellowTop and RedTop?YellowTop: A dual-purpose battery (starting and supply). It is ideal for vehicles with high energy demands from additional consumers (e.g. winches, large hi-fi systems), as it can withstand deep discharges. RedTop: A pure high-performance starter battery for maximum starting power. It is the right choice if the starting process is the main load and there are no deep discharge cycles.Is this battery suitable for vehicles with automatic start-stop?Although the YellowTop is very cycle-resistant, it was not specifically designed for the requirements of modern start-stop systems. For vehicles with start-stop technology, batteries with EFB or AGM technology in standard design, which are explicitly designed for this purpose, are recommended.Which charger do I need for this AGM battery?For AGM batteries, especially for OPTIMA batteries, a modern, microprocessor-controlled charger is recommended, which has a special charge curve for AGM batteries. This ensures a complete and gentle charge and maximises service life.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of in household waste. You can return your old battery free of charge to any retailer who sells new batteries or to local recycling centres to ensure proper disposal.

The OPTIMA YellowTop YT S 2.7 is a revolutionary high-performance AGM battery that, thanks to the patented SPIRALCELL TECHNOLOGY®, combines the maximum starting power of a starter battery with the cycle stability of a supply battery. With a nominal voltage of 12 V, a capacity of 38 Ah and a high cold start current, it is the ultimate solution for modern vehicles with extensive electrical equipment, high-performance hi-fi systems or demanding off-road accessories in a compact design.Highlights at a glanceDual-purpose functionality: Maximum starting performance and excellent cycle stability in one battery.SPIRALCELL TECHNOLOGY®: Unique spiral cell construction for extreme vibration resistance and longer service life.High cycle stability: Ideal for vehicles with many electrical consumers and for repeated deep discharges.Absolutely maintenance-free and leak-proof: The sealed AGM construction enables installation in almost any position.Compact design: High performance for vehicles with limited installation space.Maximum performance for demanding vehiclesThe OPTIMA YellowTop YT S 2.7 was specifically developed for the extreme requirements of modern vehicles that go far beyond mere starting. It is the ideal choice for vehicles with complex sound systems, additional headlights, winches and other energy-intensive consumers. Even in vehicles with seasonal use or many short journeys, which put a heavy strain on conventional batteries, the YellowTop demonstrates its superior performance and longevity.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, highly pure lead spirals are used, which are wrapped in a glass fibre fleece (AGM). This compact and extremely stable design minimises internal resistance, resulting in outstanding starting power, faster charging and unsurpassed vibration resistance. This technology makes the YellowTop the perfect hybrid solution for starting and supplying.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for harsh use. Its sealed construction prevents not only acid leakage but also evaporation, making it absolutely maintenance-free. The robust construction made of impact-resistant polypropylene and up to 15 times higher vibration resistance compared to conventional batteries ensure that vibrations and shocks in demanding driving conditions cannot harm the battery. Features  ModelOPTIMA YellowTop YT S 2.7 TechnologyAGM Spiralcell Nominal voltage (V)12 Capacity (Ah)38 Cold start current EN (A)460 Dimensions (L x W x H in mm)237 x 129 x 227 ConnectionSAE auto post & side connections Weight (kg)approx. 11.8  FAQs about the OPTIMA YellowTop batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY®?The spiral cell technology provides an extremely robust and vibration-resistant internal structure, a very low internal resistance for high starting currents and excellent cycle stability. It combines the benefits of a starter battery with those of a deep-cycle battery in a single product.What is the difference between OPTIMA YellowTop and RedTop?YellowTop: A dual-purpose battery (starting and supply). It is ideal for vehicles with high energy requirements due to additional consumers (e.g. winch, large hi-fi systems), as it tolerates deep discharges. RedTop: A pure high-performance starter battery for maximum cranking power. It is the right choice when starting is the main load and no deep discharge cycles occur.For which vehicles is this compact model particularly suitable?The YT S 2.7 is ideal due to its narrower design for vehicles with limited space in the engine bay, such as many European and Asian models, as well as for custom car projects. Despite its compact size, it supplies enough power for demanding starting procedures and the operation of additional equipment.Which charger do I need for this AGM battery?For AGM batteries, especially for OPTIMA batteries, a modern, microprocessor-controlled charger is recommended, which has a special charging curve for AGM batteries. This ensures a complete and gentle charge and maximises the lifespan.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of in household waste. You can return your old battery free of charge to any retailer that sells new batteries or to municipal recycling centres to ensure proper recycling.