Marine batteries use high starting amps which is short bursts of high power to start the engine. Good marine batteries have high starting amps to have the motor started and can run continuously for many hours just like a deep cycle battery does. The reserve capacity rating of good marine batteries is higher than normal ones. They also come with a higher cold starting amp rating. Another vital statistic is the pulse starting amp rating which measures the starting amperage with the engine.
5 Best Marine Starting Battery
Optima 8016-103 D34M Starting Battery
Optima 8052-161 D31M Starting Battery
Optima 8040-218 D35 Dual Purpose Battery
Optima 8006-006-FFP 34M Marine Starting Battery
Optima Batteries OPT8020-164 35 Starting Battery
This popular battery serves both as a dedicated starting battery and a deep cycling battery. It comes with 15 times more vibration resistance compared to a wet-cell battery. It can take three times more recharges compared to the cheaper batteries as well.
You can mount this 750 cold-starting amp spill-proof battery in any position. It weighs 43 pounds and measures 10 by 6⅞, and it is 7 and 13/16 inches tall. You can start your motor successfully with it no matter how adverse the weather condition is.
It can discharge 25 amps for 120 minutes when used at 80 degrees Fahrenheit. With 100 amps to recharge, it gets 90% charge capacity in about 35 minutes. One downside of this battery is that you have to use its own charger to recharge it to save it from overcharge.
- It can start a motor with no problem even at zero-degree Fahrenheit.
- It can power boats laden with lots of gadgets.
- You can recharge it within a short time.
- It can last for a thousand recharging cycles.
- It’s spill-proof, and you can mount it at any angle.
- It’s maintenance-free.
- It won’t overcharge providing that you use the right charger.
- Without the appropriate charger, you might end up overcharging the battery.
- You need to follow a set of instructions when you recharge it.
This powerful battery comes with Spiral Cell Technology that ensures efficient performance. The AGM plates hold electrolytes firmly and prevent spills. The technology used in this battery prevents intense vibration, corrosion or acid leaks as well. Adverse weather won’t stop it from providing you with optimal starting power. The reserves capacity of 155 ensures steady performance. It is ultra resistant to vibration which ensures its persistence.
- The battery is spill proof
- It doesn’t require maintenance
- Maintains optimal starting power even on a bad weather
- Resistant to vibration and shock up to 15 more times than normal batteries
- Perfect for both deep cycle and starting
- Has a reserve capacity of 155 minutes for continuous performance
- Perfect for boats and recreational vehicles laden with gadgets
- Comes with a less warranty compared to other batteries
This one works well with higher electrical loads. You can start small to medium sized outboard motors with this 650 cold starting battery. This 12-volt battery weighs 36 pounds and measures less than 10 by 7 inches. It suits well in small boats with limited space.
It has a reserve capacity of 98 minutes which is perfect for good deep cycling. Its exterior is made of a thick and durable plastic. It is 15 times less vibration prone compared to other batteries. The fewer the vibrations are, the longer the battery lasts. It offers the best warranty. So you will get a free replacement in case your battery is defective or stops working.
- Compact and lightweight
- Outstanding performance
- Works well with small and medium sized outboard motors
- 98-minute reserve capacity makes it perfect for trolling motors
- Durable exterior
- Overcharging the battery will reduce its durability
This top quality marine starting battery can work in adverse weather. It has a thick and durable plastic exterior which ensures super vibration resistance compared to other batteries. Having 800 cold starting amp and 1000 marine starting amps, it is more suitable for starting a motor for small and medium-sized outboard engines. Its reserve capacity is 100 minutes and weighs only 40 pounds. You can easily mount light and compact in any position in your boat.
- Provides with sure starting and string starting
- Higher reserve capacity
- Fifteen times more resistant to vibration
- Optimal starting power even on bad weather
- Doesn’t need maintenance
- Two-year warranty
- You need to purchase a separate deep cycle battery for a trolling motor
- Overcharging the battery can cause permanent damage
The Optima 8020-164 35 RedTop Starting Battery generates a very strong burst of ignition power. This AGM battery includes a positive and a negative coated lead plates. Its reverse capacity of 90 minutes provides with constant performance. The battery durable compared to others. This redtop battery exceeds many conventional batteries when it comes to starting applications, and it provides with impressive high power delivery and high resistance.
- 2x longer life compared to other batteries
- The battery is maintenance free
- Has a faster recharging time
- Provides optimal starting power
- Comes with applicable installation height adapters
- Works well with trucks, motorcycles, and cars
- It is heavy and expensive
Buying Guide for Best Marine Starting Battery
Whether a battery is right for you or not dependents on the usage of the battery. Below is a list of factors that you should consider.
The marine batteries may be used for two broad purposes: starting an engine, and powering the vessel throughout its journey. If you intend to use the battery for starting only, go for the one with a low rating capacity, but if you intend to use it for both starting and powering your boat, then a deep cycle or dual purpose battery with higher current capacity is best for you.
Cold Starting Amps
Cold Starting Amps or Marine Starting Amps is a measure of the ability of an acid battery to support plenty of power within a short duration of time. It shows how much of electrical power the lead-acid of a battery can generate within a 30-second duration, at zero degrees Fahrenheit temperature, before the voltage ultimately drops to below the 7.2 Volts threshold which is the minimum power needed to crank an engine.
Reserve Capacity Rating
Reserve capacity is the total duration that a fully-charged battery works. For example, a battery 150 minutes of reserve capacity rating can last for two and a half hours while discharging a load of 25 Amperes. The battery with the higher reserve capacity is preferable for optimal performance.
Amp Hour Rating
It is a measure of the number of amperes that a battery produces in a duration of 20 hours. For instance, a battery with a 100 ampere-hour rating can provide 5 Amperes of electrical current per hour for a total duration of 20 hours, providing that other factors are constant. However, some electrical current is usually lost by reason of the battery’s internal resistance. So it is strongly recommended that a higher rating than the one desired is to be generally selected.
Charging of the Battery
The electric appliances on boats draw current from the deep cycle battery, and it needs to be charged regularly to prevent damage to the battery. There are many methods of charging the battery from onboard chargers to portable alternatives.
Price and Warranty
Consider the cost of the battery and the accompanying warranty before you make the final decision. Choose one that balances between the two so that you can get the best service within your budget.
Choose a battery that you can use for both starting the motor and powering onboard devices. That means it will work both as a starter and a deep cycle battery.
Choose a battery that is light and portable weighing somewhere between 20 pounds (9.1 kg) and 50 pounds (22.7 kg).
Vibration Resistance and Durability
As choppy waters create jarring vibrations, choose a battery that can withstand these vibrations easily. Spill-proof and shock-resistance boost durability as well.
The voltage rating of a boat battery decides the amount of power it generates. So a 24 Volt battery is preferable as it generates plenty of power and reliable as well.
People often overlook the necessity of having a suitable marine starting battery for their boats, and they have the wrong impression that any battery will do the job well. They can only understand how wrong they were once they get stuck in the middle of the water. So be wise enough to buy the best marine starter battery for a wonderful cruising experience.