![]() The sealed AGM batteries are spill-proof and maintenance-free (a win for vulnerable marine ecosystems like coral reefs), and you can mount them in whatever position best suits your boat’s configuration. The battery’s tightly wound construction keeps plate movement to a minimum and offers 15 times the vibration resistance for reliable cranking power even in rough conditions. The battery’s patented SpiralCell technology delivers more power in a single burst than conventional flat-plate batteries and allows for triple the number of recharges. It has a 100-minute reserve capacity, 50Ah amp hour rating, and a CCA rating of 800 amps-more than enough to start most recreational engines, even in winter. If your sole reason for buying a marine battery is to start your medium-power inboard or outboard engine, the Optima 34M BlueTop Marine Starting Battery is a trustworthy choice. ![]() ![]() Price at time of publish: $200 for group 22, 40 poundsĭimensions: 6.75 x 8.75 x 10.87 inches | Weight: 56 pounds A one-year free replacement and a 36-month pro-rated marine battery warranty back your purchase. You can rely on the durability and vibration resistance of the AGM construction, while the dual terminal design makes installation easy. It is built to withstand repeated deep discharges and is conveniently quick to recharge. Once your engine has started, the battery’s deep-cycling capabilities power your trolling motor and other electronics (your fish finder or electric radio, perhaps). Despite a retail price of around $200, it has a CCA rating of 545 amps and a reserve capacity of 120 minutes at 25 amps. If you have a small to medium horsepower engine that doesn’t need all the cranking power provided by the other dual-purpose batteries on this list, you can save big bucks with the Bass Pro Shops Pro Series Deep-Cycle Marine Battery. Although expensive, it’s still cheaper than purchasing separate cranking and deep cycling batteries of the same quality.ĭimensions: 13 x 6.8 x 9.4 inches | Weight: 77.8 pounds AGM batteries are also more resistant to shock and vibration and have a lower self-discharge rate. The battery’s AGM design means that you don’t have to top it up with distilled water or worry about spilled battery acid as you would with traditional wet-cell batteries. Rated to 100Ah, it should deliver 5 amps of current per hour for 20 hours, giving you plenty of time to troll your local lake, river, or ocean to hang with a variety of marine life without recharging.Ī full recharge takes just four to six hours. It also has impressive deep cycling capability, lasting up to 400 cycles at 80 percent depth of discharge and a reserve capacity of 142 minutes. It offers 1150 CCA, giving it a massive cranking power capable of starting any recreational inboard or outboard motor, even in cold weather. Each battery must be fully charged and completely isolated from the other before connecting them in series, or there will be damage to at least one of them.Odyssey’s Marine Dual Purpose Battery fulfills the twin roles of a cranking and deep cycle battery with incredible efficiency. If one 12V lead-acid battery is connected to another 12V lead-acid battery, you have 24V total power output. The voltage of a series connection is equal to the sum of the voltages of all its batteries. If you need 24 Volts, you can connect two group 4D batteries in series to double the voltage. How to Get 24 Volts from 12V of a 4D Battery Group Battery Group Numberīigger batteries can have more capacity and power compared to 4D batteries. Smaller batteries can have less capacity, performance, and power in comparison with 4D group. Please pay attention to the post terminal types and their location Closest Groups that Have Slightly Smaller Dimensions Closest but not Identical Size Battery Groupsīattery groups in this section below are not identical to the group 4D battery, they can be a little bigger or smaller. If your battery holder can't hold the alternative battery group, you can buy a universal battery holder to fit in different types of batteries. In both cases, you must securely fasten your new battery with a battery holder. If your battery compartment cannot accommodate a larger battery, you can choose a smaller one. There are no direct interchangeable alternatives for group 4D battery if we speak about dimensions, but if your battery space hasn't strict limits, you can choose a little bigger or smaller battery group. ![]() Group 4D Alternatives and Closest Battery Groups by Dimensions ![]()
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