The OPT8016-103 Optima Group 34M Battery is a dual-purpose marine battery designed for both starting engines and providing deep-cycle power in marine applications. Part of Optima’s BlueTop series, this absorbed glass mat (AGM) battery offers spill-proof construction, vibration resistance, and maintenance-free operation. It’s optimized for boats, RVs, or off-grid systems requiring reliable cranking power (800+ CCA) and sustained energy delivery for accessories like trolling motors or navigation systems. Group 34M sizing ensures compatibility with standard marine battery compartments. Pro Tip: Its spiral-cell AGM design maintains charge longer than flooded batteries during seasonal storage.
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What distinguishes BlueTop marine batteries from automotive variants?
Optima BlueTop batteries like the OPT8016-103 feature dual-terminal designs (SAE and threaded posts) and deep-cycle capabilities absent in automotive-focused RedTop models. Unlike car batteries prioritizing short bursts of starting power, BlueTop’s thicker plates withstand repeated 50-80% depth-of-discharge cycles common in marine applications. For example, a BlueTop 34M can power a 50lb thrust trolling motor for 5+ hours while retaining enough reserve to start a 300HP outboard.
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How does Group 34M sizing impact marine installations?
Group 34M (Marine) denotes specific dimensions (10.25″L x 6.8125″W x 7.5625″H) and terminal orientation standardized for marine/RV use. This sizing allows secure mounting in roll-prone environments—the lower height vs Group 31 prevents top-terminal contact with metal surfaces during rough seas. Compared to automotive Group 34, 34M adds dual terminals and marine-grade corrosion resistance.
| Feature | Group 34M | Group 31 |
|---|---|---|
| Height | 7.56″ | 9.38″ |
| Capacity (Ah) | 55 | 100 |
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FAQs
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Yes, but with limitations—its 55Ah capacity suits small systems. For daily solar cycling, opt for true deep-cycle batteries like lithium LiFePO4 with 2000+ cycles.
How to maintain Optima BlueTop batteries?
Clean terminals quarterly with baking soda solution. Store at 50-80% charge if unused. Avoid discharging below 10.5V to prevent sulfation.
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