The Optima Bluetop D31M Marine Deep Cycle Battery is to be used when a dedicated starting battery is required; it should never be used for cycling duty. The dual-purpose Bluetop (light gray case) can be used for both starting and deep cycling; it is a true deep-cycle battery with extremely high cranking power.
This can also be used by trolling motors, marine applications with heavy electrical accessories and RVs should use a dual-purpose Bluetop (which is both a starting and deep-cycle battery) and marine applications and RVs when the battery’s only function is engine starting.
- Both dual-purpose and starting applications available
- Up to 3x more recharges than other marine batteries
- More than 15 times the vibration resistance
- Mountable in virtually any position
- Optimal starting power (dual purpose and starting applications available)
- Works well as a boat battery or RV battery