Boat & Marine Batteries

Outrageously Dependable Marine Batteries

Interstate delivers the preferred brand of high-quality batteries to power your boat's navigation devices, lights and engine. Whether you need a deep-cycle marine battery, trolling motor battery, starting battery or both, we have you covered with our lineup of high-quality products built to withstand the harsh conditions of the open water, including vibration and moisture. Get the durability and longevity you want when the water calls with Interstate.

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Part Number	SRP	Group Size The physical dimensions of a battery.	CCA Cold cranking amps start your car. If this number meets or exceeds your vehicle’s needs, you’re good to go.	CA Cranking amps are measured at warm temperatures to show what a battery can deliver under ideal conditions. CCA indicates performance under harsher conditions.	RC Reserve capacity is the steady power your battery provides the electrical system when the alternator is not operating.	Ah Ampere hour measures the battery’s capacity and indicates how much energy can be stored by the battery.	Length	Width	Height	Weight	Termination Code	Voltage	Wet/Dry
SRM-24-INTL	Not Listed	24M	500		120	70	260	174	225	17.3	TOP	12	W
SRM-27-INTL	Not Listed	27M	770		160	90	304	172	225	20.9	TOP	12	W

Availability may vary by region; please contact your authorized distributor for further details.

Trust Interstate for the Reliable Marine Battery Advice

What's the Difference Between a Marine Battery and a Regular Battery?

Marine batteries are built for durability and long-lasting power. They have thicker plates and are 15% more vibration-resistant than regular car batteries, making them better suited for rough water conditions. Unlike car batteries, which deliver short bursts of high power to start engines, marine batteries, especially deep-cycle types, are designed to handle repeated deep discharges, making them ideal for powering electronics.

How Long Will a Marine Battery Last?

Most marine batteries last 2 to 5 years, with 3 to 4 years being typical, though this depends greatly on the battery type and how well it is cared for. Lithium (LiFePO4) batteries have the longest lifespan, often lasting 10 or more years. Lead-acid batteries (flooded or AGM) generally last 2 to 6 years. Proper maintenance, such as charging after each use and storing the battery in a cool place, is essential for maximizing lifespan.

What Type of Battery Is Best for Marine Use?

For most boaters, sealed AGM batteries are the best all-around choice. They are maintenance-free, widely available, and more affordable upfront, making them a practical option for everyday use. For high-performance or deep-cycle applications, however, lithium iron phosphate (LiFePO4) batteries are the superior option. They offer high energy density, can be fully discharged to 100% depth of discharge without damage, and typically last 10 years or more, making them a worthwhile long-term investment for serious boaters.