OPTIMA RedTop RT S 4.2 AGM lead-acid battery 12V 50Ah

The OPTIMA RedTop RT S 4.2 is a revolutionary high-performance starter battery that delivers maximum starting power in a compact and extremely robust housing thanks to the patented SPIRALCELL TECHNOLOGY®. With a nominal voltage of 12 V and a massive cold start current of 815 A, it is the ultimate solution for demanding vehicles that require a reliable and powerful start under all conditions. Its extreme vibration resistance and absolutely maintenance-free, leak-proof construction make it the first choice for hot rods, off-road vehicles, agricultural machinery and all vehicles that need more than just an ordinary battery.

Highlights at a glance

• Maximum starting power: Offers the highest possible starting performance for reliable engine starting even in extreme temperatures.
• SPIRALCELL TECHNOLOGY®: Unique spiral cell construction for extreme vibration resistance and longer service life.
• Extreme vibration resistance: Up to 15 times more vibration resistant than conventional batteries, ideal for tough off-road use or strong vibrations.
• Absolutely maintenance-free and leak-proof: The sealed AGM construction allows installation in almost any position.
• Long service life: Lasts up to three times longer than a conventional starter battery.

Maximum performance for demanding vehicles

The OPTIMA RedTop RT S 4.2 was specifically developed for the extreme demands of high-performance vehicles, whose main requirement is a powerful starting impulse. It is the ideal choice for trucks, SUVs, hot rods, classic cars and construction vehicles. Even in seasonal use or after long periods of downtime, it reliably provides the necessary power to start large engines effortlessly. Its compact design and high power density also make it the perfect solution for vehicles with limited installation space.

Superior SPIRALCELL TECHNOLOGY®

At the core 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 mat (AGM). This compact and extremely robust design minimises the plate spacing, maximises the active surface area and reduces internal resistance. The result is unrivalled starting performance that can be delivered consistently even under the toughest conditions.

Built for the most demanding conditions

The OPTIMA RedTop is designed for tough use. Its sealed construction not only prevents acid leakage but also evaporation, making it absolutely maintenance-free. The robust construction made of impact-resistant polypropylene and the extreme vibration resistance ensure that vibrations and shocks in demanding driving conditions cannot affect the battery.
 

Features

FAQs about the OPTIMA RedTop Battery

What 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 maximum starting currents and a longer service life compared to traditional batteries with flat plates. It is optimised for maximum starting performance.

What is the difference between OPTIMA RedTop, YellowTop and BlueTop?

RedTop: A pure high-performance starter battery for maximum starting power. Ideal for vehicles where the starting process is the main load. YellowTop: A dual-purpose battery (starting and supply) for vehicles with high energy demands due to additional devices (e.g. winch, large hi-fi systems). BlueTop: Specialist for marine and leisure vehicles, available as a pure starter battery or as a dual-purpose battery.

Is this battery suitable for vehicles with lots of electrical consumers?

The RedTop is primarily a starter battery. If your vehicle also includes extensive equipment such as powerful hi-fi systems, additional headlights or a winch that are operated when stationary, an OPTIMA YellowTop or BlueTop (dual purpose) is a better choice, as these are designed for deep discharge cycles.

Which charger do I need for this AGM battery?

For AGM batteries, especially OPTIMA batteries, a modern, microprocessor-controlled charger is recommended that has a special charging curve for AGM batteries. This ensures full 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 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.