If your boat uses 6-volt, 8-volt or some other type of battery that isn't 12-volt, you can still read the next few paragraphs, but know that OPTIMA doesn't offer replacements in those voltages for your boats. ![]() Most boaters will use 12-volt lead-acid batteries in their boats. Some of these storage areas may be able to hold a physically larger battery than the one you have in your boat now, while others may be maxed out already with the battery you currently have. Some boat batteries are stored in external plastic containers or boxes, while others may have a special storage area integrated into the design of the boat. Once you understand what the manufacturer's energy recommendations are for your boat and/or engine, you should look at the storage location for your battery to understand how much space you have for a battery. Some boat manufacturers (and even a few engine manufacturers) will have specifications in this regard, that you should also meet or exceed. Generally speaking, these specifications describe the amount of energy a battery is capable of delivering over an extended period of time and the larger the number, the more energy they have available. The other specification is reserve capacity, typically measured in amp hours (Ah) or reserve capacity (RC). If your engine needs 500 MCA, you don't need to overspend on a 1000 MCA battery. We recommend meeting or exceeding the manufacturer's recommendation, although you don't have to go crazy. Most boat engine manufacturers will list specifications for cranking amps in some form (CA, MCA or CCA) for their engines and that information is readily available online or from the engine manufacturer. There are two specifications you'll want to pay close attention to as it relates to your battery- cranking amps and reserve capacity.Ĭranking amps (CA), also measured in marine cranking amps (MCA) or cold cranking amps (CCA), helps you understand how much energy your battery can deliver in a short burst of power, typically to start an engine. If your boat already has a battery, what size is it? If you bought it new with that battery, you'll probably want to replace it with a battery that at least matches the original battery's specifications, if not exceed them. There's nearly as many different types of batteries to match all those types of boats, which can make finding the right sized battery for your boat a challenge. Other customers have taken Optima batteries for tough 4x4 bush trips for camp lighting, but then ended up using them for all the vehicle starting as their normal starting batteries failed in turn.If you've spent any time on the water, you know the wide variety of boats that are out there- fishing, jet, pontoon, ski, wake, center console, sail and the list goes on. ![]() Some of our customers after fitting Optima's in their boat could not believe how quickly they recharged on a short trip (only 35 minutes from flat to fully charged at 100Amps for the larger Yellow Top's). ![]() Fast recharging too with its Absorbed Glass Mat (AGM) design. This high starting power, combined with cycling capability (in Yellow Top and some Blue Top's) makes an Optima an excellent choice for many applications. The Optima 34M is an extremely tough battery, with huge cranking amps for its size.
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