OPTIMA BlueTop BT DC 5.5 AGM lead-acid battery 12V 75Ah

The OPTIMA BlueTop BT DC 5.5 is a revolutionary high-performance AGM battery that offers exceptional performance as a starter and deep-cycle supply battery thanks to the patented SPIRALCELL TECHNOLOGY®. With a nominal voltage of 12 V, a high capacity of 75 Ah and enormous starting power, it is the ultimate solution for demanding marine and leisure vehicles. Its extreme vibration resistance and absolutely maintenance-free, leak-proof construction make it the most reliable choice for anyone who needs maximum performance and operational safety on the water and on the road.

Highlights at a glance

• SPIRALCELL TECHNOLOGY®: Unique spiral cell construction for extreme vibration resistance and a longer service life.
• Dual-purpose functionality: Superior performance as a starter battery for the engine and as a cycle-stable supply battery for the on-board electronics.
• Extreme vibration resistance: Up to 15 times more vibration resistant than conventional batteries, ideal for tough use on the water.
• Absolutely maintenance free and leak-proof: The sealed AGM construction enables installation in almost any position.
• High charging efficiency: Charges much faster than conventional lead-acid batteries.

Maximum performance for marine and leisure vehicles

The OPTIMA BlueTop BT DC 5.5 was specifically developed for the extreme requirements in the marine and motorhome sector. It delivers the massive power needed to start large boat engines, while also reliably and durably supplying energy-intensive consumers such as trolling motors, sound systems, navigation devices and the on-board kitchen. Its ability to withstand hundreds of charging and discharging cycles makes it the perfect all-in-one solution for a long, carefree day on the water or on holiday.

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 mat (AGM). This compact and extremely stable design minimises plate spacing, maximises the active surface area and reduces internal resistance. The result is unsurpassed starting performance, extreme vibration resistance, longer service life and faster recharging capability.

Built for the most demanding conditions

The OPTIMA BlueTop is designed for tough use. Its sealed construction not only prevents acid leakage, but also evaporation, making it absolutely maintenance free. The robust design and extreme vibration resistance ensure that waves, vibrations and shocks cannot damage the battery. Thanks to its low self-discharge, it is also the ideal choice for seasonal operation.
 

Characteristics

FAQs about the OPTIMA BlueTop 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 high starting currents and a longer service life compared to traditional batteries with flat plates. It combines the advantages of a starter battery with those of a deep-cycle battery.

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

BlueTop: Specialist for marine and leisure vehicles, often with additional threaded connections. Available as a pure starter battery (dark grey housing) and as a dual-purpose battery (light grey housing) like this model. YellowTop: A pure dual-purpose battery for land vehicles with high energy requirements (e.g. off-road vehicles with winches, large hi-fi systems). RedTop: A pure high-performance starter battery for maximum starting power.

Which charger do I need for this AGM battery?

For AGM batteries, especially for OPTIMA batteries, a modern microprocessor-controlled charger with a specific charging curve for AGM batteries is recommended. This ensures a complete and gentle charge and maximises service life.

Can I install the battery in any position?

Yes, thanks to the sealed AGM spiral cell construction, the battery is leak-proof and can be installed in almost any position, providing extra flexibility when fitting in confined spaces on boats or motorhomes.

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 dealer who sells new batteries or to local recycling centres to ensure proper disposal.