Optima Blue Top Dual Purpose & Engine Start Batteries

The OPTIMA BlueTop comes in two varieties, which makes it ideal for use in all marine applications. One version is a powerful starter battery that, even when operating in the wettest conditions, or in situations where the battery has not been in use for long periods, delivers maximum power. The other version is a starter/ deep cycle battery that also provides power to all your onboard equipment and accessories

• Dual purpose starting and deep cycling.
• more power in the initial 1, 2 ,5 and 10 seconds of the starting process than comparably rated conventional lead acid batteries.
• Ideal for seasonal use, fully charged, it can sit unused for up to 12 months at room temperature (or below) and still provide the power necessary to start your boats engine.
• Constant performance quality keeping your battery running at the same level even as it's being discharged
• Nonspillable with complete fitment flexibility; can mount in almost any position.

OPTIMA's BT DC 4.2 and BT DC 5.5 BlueTop batteries are dual-purpose batteries. They can be used in any deep cycle (marine accessory, house applications, trolling motor, bow thrusters) or starting applications.

BlueTop SLI (Starting, Lightning & Ignition)

OPTIMA's BT SLI 4.2 BlueTop battery is a starting battery. Although you can use a deep cycle battery in any application, the SLI 4.2 is better for starting applications due to the higher cranking ability.