The OPTIMA® BlueTop battery will keep you on the water longer. Its patented SPIRALCELL® Technology
means more running time, faster recharge, and up to twice the life of traditional marine batteries.
Available in capacity up to 75Ah.

BlueTop Deep Cycle 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, starting batteries can only be used for starting applications.

Deep    Discharge    Cycling    Characteristics

• Starting and dual purpose (starting and deep cycling) models available.
• Lasts up to 2 times longer than other batteries.
• More power in the inital 1, 2, 5, and 10 seconds of the starting process than comparably rated
  conventional lead acid batteries.
• Constant performance quality keeping your battery running at the same level even as it's being discharged.
• 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 boat's engine.
• 15 times more resistant to vibration than other batteries.
• Nonspillable with complete fitment flexibility; can mount in almost any position