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10 New Best Deep Cycle Battery in 2018 – Reviews and Top Picks

If you have found yourself in the market for a new deep cycle battery, you will want to choose the right one for the job. Choosing the best deep cycle battery for whatever your intended purposes should take some thought and consideration of important facts and features. This detailed buying guide will walk you through the key points and characteristics to consider when choosing which to purchase so that you are buying the best one for your specific situation without wasting your time and money.

What is a Deep Cycle Battery?

 A deep cycle battery is one that is meant to use up all it’s power in one use, only to be charged up and used again on another occasion. This differs greatly from a starter battery, like you would find in automotive vehicles. A starter battery gives out short bursts of power, like upon starting a car and do not use their entire power supply in one use.

You may use a deep cycle battery for things such as:

  • Recreational Vehicles
  • Large boats and ships
  • Generators
  • Golf Carts
  • Fork lift trucks
  • Traffic signals
  • Uninterrupted power supplies

How to Choose a Deep Cycle Battery?

When you are looking for a deep cycle battery, it is important to consider a few key factors which will affect the one you eventually choose. These features and characteristics are of importance to ensure you are choosing the right one for your usage and size needed.

Hours of Use/Amp Hours

When shopping for the right deep cycle battery to suit your needs, you should consider how long the battery will give you the energy you need before requiring a charge. For larger capacity uses, such as recreational vehicles, you will need something that will last for some time preferably in case you do not have access to electricity for charging.

Life of the Battery

 A deep cycle battery is meant to be discharged of it’s stored energy over time and then charged again for future use. The life of the battery refers to how many life cycles the battery promises to you as the user. If you anticipate requiring heavy use from your deep cycle battery, on a frequent basis, you will want to look for a battery with a higher number of life cycles.

Size and Weight

For obvious reasons you will want to select a battery that will fit the application you intend to use it for. Some are much larger than others and obviously weigh more as well. If you have a battery that is too heavy, it could add unnecessary weight to your vehicle (like a boat or golf cart) and change the ability of the vehicle to function properly. It is important to check your owner’s manuals or instructions for the item you want to power up, to see what the manufacturers recommendation is for battery size.

Charge Time

Charge time could mean the difference between you having heat or air conditioning for a few hours or not. It is key to check in to how long the manufacturer states that the battery takes to charge once it is discharged. It would be helpful if the battery you choose has built in protection against overcharging which could cause damage.

Volts

Every battery, whether deep cycle or starter, has a voltage rating. The volts will tell a little about the power output available or even left on the battery. This measurement can also help you choose the correct battery for your use since you may need a battery with a higher voltage for bigger jobs.

Type of Deep Cycle Battery

Within the deep cycle family there are three types to choose from: Sealed Lead Acid Batteries, Flooded Lead Acid Batteries, Gel Batteries and, Lithium-Ion Batteries.

Sealed Lead Acid Batteries

These are common amongst deep cycle batteries available. They are also known as Valve Regulated Lead Acid batteries. This type of battery is mostly sealed off from all air and the pressure is regulated by a valve. In these types of batteries, nitrogen and oxygen are used to create electricity. They are usually more affordable than other types of deep cycle batteries and can store a very large capacity of energy.

Flooded Lead Acid Batteries

Simply stated, these are unsealed batteries and they are filled up with distilled water and acid. These types of batteries will require more maintenance than others since the water may need topping up from time to time. It is important to monitor the levels to get the most energy output possible from the battery. FLA batteries are very affordable, and the maintenance is straightforward for those who may not understand the workings of deep cycle batteries.

Gel Batteries

These types of batteries are a newer technology in terms of deep cycle batteries. They can be positioned however you need and have a slower discharge rate, meaning they will last longer. They are a little more expensive than other types, however. It is important to note that maintenance with this type is required to be done usually by a professional. Gel will need to be topped up, but it is not a job for you to do safely yourself.

Lithium-Ion Batteries

Of all the types of deep cycle batteries, these are the newest technology. They can withstand extreme temperatures, pressure and vibrations. They are the most lightweight style of all available and boast the best energy storage as well as output. They are, however, the more expensive type of battery and not always readily available.

You may also looking: How to choose Best Trolling Motor Battery?

The Best Deep Cycle Battery for You

**Below, you'll see more detailed reviews, but you can also click the links above to see current prices and read customer's reviews on Amazon

Our Top Pick

Vmaxtanks Vmaxslr125 AGM Deep Cycle 12v 125ah SLA rechargeable Battery

  • Editor's Choice

The Vmaxtanks AGM deep cycle battery boasts military grade plates and a life span of around 8 to 10 years. This 12-volt battery can be connected to additional batteries if you require more output than just one deep cycle battery. It has a 125-amp hour rating and a faster charging time than other deep cycle batteries.

It is not a very large battery, so you won’t require a lot of space to house it, although it may be slightly taller than other similar batteries. The overall dimensions are 12.9" long, 6.8" wide and 8.7" high with a total weight of 75lbs. The entire battery is encased in plastic, as well as the handle so it may not be advisable to carry the battery too often or it could break.

Pros

  • Fast charging time
  • Large capacity for energy
  • 125-amp hours
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    Could last up to 10 years
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    Great for RV’s, Solar Panel systems
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    Mount it in any position
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    Can link multiple batteries for added power
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    Great quality lead plates for good connectivity
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    Excellent quality and reliability even for robust systems

Cons

  • A little heavy at 75lbs
  • May cost more than other similar batteries
  • 12 volts only, no option for 24 volts
  • Still need some venting to avoid explosion
  • Connecting cables not included
  • Handle not very strong to support weight of battery

2. Universal UB121000-45978 12v 100AH Deep Cycle AGM Battery

This AGM deep cycle battery comes with an amp-hours rating of 100 and can be mounted safely in any position necessary without compromising power. It comes at a moderate price range and isn’t too heavy at just over 60lbs. The overall dimensions are 12.17 inches x 6.61 inches x 9.16 inches, so it will fit nicely into most dedicated spaces. If you wish to have even more power, this battery can be connected to others easily.

It has wing nut terminals as opposed to the bolt-on type, as with other AGM batteries. It is a spill proof battery, but you will still need to ensure it is properly maintained as with any battery. You never have to worry about vibrations or shocks since this battery is resistant to both. This battery can last for days if being used for things such as a camper or RV.

Pros

  • Moderate price point
  • Fits into most spaces
  • Mount in any position safely without losing power capability
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    Works with automotive terminals
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    Can link to more than one battery for more power and voltage
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    Nuts, bolts and washers all included with the battery
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    Rope handle can hold the weight of the battery
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    Not too heavy at just over 60lbs.

Cons

  • Only 12 volts per battery; may need more than one to power up
  • May last only about a year before needing replacement
  • Tend to output about 80ah instead of 100ah
  • May need more frequent charging; seems to lose power quicker than other batteries
  • Height may be a little higher than the average AGM battery

3. VMAX MR127 12 Volt 100Ah AGM Deep Cycle Maintenance Free Battery

The VMAX 100Ah deep cycle battery is great for boats and trolling motors. It has convenient carrying handles built-in to the casing which flip and up and down as needed. They are made from heavy duty plastic, so they will support the 68lbs. easily.

You can mount and install this battery in any position safely since it is spill-proof. The electrolytes are absorbed by the AGM and it is resistant to most shocks, bumps and vibrations. In fact, it is considered a non-spill and non-hazardous battery. This battery promises to keep performing at it’s best even after many deep discharges.

Pros

  • Mountable in any position to fit your exact needs
  • Heavy gauge plastic handles for carrying which hide away easily
  • Reliable even after many deep discharges
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    Moderate size will fit most space on boats
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    Fast charge time
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    Non-spillable and non-hazardous
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    No vapor issues

Cons

  • Above average price point
  • Heavier than other similar batteries, especially for a boat
  • Little to no maintenance required
  • Too heavy to connect more than one on a small vessel
  • Only 12 volts as opposed to 24
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    100Ah instead of 125Ah

4. Mighty Max Battery ML35-12 - 12V 35AH U1 Deep Cycle AGM Solar Battery

This very affordable deep cycle battery is small but still gets the job done. It measures only 7.68 inches x 5.16 inches x 7.13 inches and weighs in at about 23lbs. It features a handy loop handle to carry it easily. The small size means it can fit in even the most compact areas. It is versatile to use both indoors and outdoors since it has a valve to regulate it. It is also basically maintenance free, making it great for users of all experience levels.

You never have to worry about temperatures since this battery is adaptable and can withstand both hot and cold temperatures. If you require a battery that can be recovered well after many deep discharges, this one will stand up to the test.

Pros

  • Small enough to fit almost all dedicated spaces
  • Very lightweight at 23lbs.
  • Very budget-friendly
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    Use it indoors and outdoors
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    Easy carrying handle mounted on top
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    Maintenance free or close to it
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    Great for small watercrafts or tent camping

Cons

  • Only rated at 35Ah
  • Cannot use for larger applications such as RV, lawn tractors, golf carts etc.
  • Posts are easily bent if you connect too tightly
  • Charge isn’t held for very long
  • No wire harness or hardware for mounting are included

5. Mighty Max Battery ML18-12 - 12V 18AH CB19-12 SLA AGM Rechargeable Deep Cycle Replacement Battery

This lightweight, budget-friendly deep cycle battery is great for light duty use and has one of the lowest price points on the market. It has 18-amp hours and 12 volts of power. It is made to withstand varying temperatures; therefore, outdoor use is fine. The battery is maintenance free and spill-proof. The very small size, 7.13 inches x 3.01 inches x 6.57 inches, means it is ideal for use in kayaks, small boats or medical devices and more. Since it is so light, at just under 12lbs., using it in lighter vehicles is ideal. This battery comes with screws and bolts.

Pros

  • Small size will allow use in the tightest of spaces
  • Easy to transport since it is so lightweight
  • Maintenance free
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    Spill-proof
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    Extremely affordable compared with most other batteries
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    Withstands various temperature fluctuations

Cons

  • Very light, not intended for heavy duty use
  • Only 18Ah
  • Requires frequent re-charging
  • May last only approximately 20 cycles before needing replacing
  • Comes with screws and bolts only, not wire harness or mounting hardware
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    Average run time around 3 hours
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    Should be mounted in upright position

6. 12V 55Ah Power Boat Pontoon Electric Trolling Motor Deep Cycle Battery - Mighty Max Battery

If you are looking for a moderately priced deep cycle battery, this Mighty Max is ideal. It has an average of 55Ah, which is useful for light to moderate duty jobs. Since it can be mounted in any position, you won’t have trouble fitting it where you need it. It comes with screws and bolts but no wire harness or hardware for mounting. This battery weighs in around 39lbs. and measures 9.02 in x 5.43 in x 9.13 in. Some great uses include smaller boats, trolling motors, medical equipment and more.

Pros

  • Average price point
  • Easily transported since it does not weigh too much
  • Small size to fit easily into your dedicated space
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    About 9 hours of use if used steadily—great for small duty jobs

Cons

  • No wiring harness or hardware for mounting is included with this battery
  • Not ideal for large jobs such as an RV, large marine vessels etc.
  • Takes a while to charge up after being discharged completely
  • Loses some power when sitting idle
  • Could have more amp hours (only 55Ah)

7. 12V 100AH BATTERY FOR SOLAR WIND DEEP CYCLE VRLA 12V 24V 48V - Mighty Max Battery

If you have the need to use power for longer periods of time, this Mighty Max deep cycle battery is great. It has a 100 Amp hour rating and is 12 volts. You will never need to top up this battery with fluids as you would with wet cell batteries. You can start using this battery as soon as you take it from its box. Since it has a calcium-alloy grid, it promises to perform excellently.  The valve regulation means you can use this battery for both inside and outside use, giving you many options such as lawn equipment, boats, solar set-ups and even motorcycles. It is a little on the heavy side, at around 64lbs. but not too large, measuring 12.17 in x 6.61 in x 8.30 in.  The battery comes with terminal screws but no wiring harness or any hardware for mounting purposes.

Pros

  • Average price range
  • 100Ah means users can longer use than a less expensive option
  • Valve regulated AGM battery means it can be used inside and outside
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    Resists shocks and vibrations
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    Mount in any position needed
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    Average size at 12.17” x 6.61” x 8.3”
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    Can recover from many deep discharges
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    No maintenance like topping with fluids

Cons

  • On the heavy side at 64lbs.
  • Terminals feel brittle; caution needed with tightening screws
  • No wiring harness or hardware to mount the battery included
  • Some come with a corded handle while others have a plastic handle
  • Some batteries have trouble holding a charge when idle

8. ExpertPower 12v 33ah Rechargeable Deep Cycle Battery

The ExpertPower deep cycle battery is an economical option without compromising too much power. With the 33Ah rating, users should get about 10 to 17 hours of run time from a single charge. This battery weighs around 23lbs and comes with a built-in plastic carrying handle for added convenience. It is an AGM valve regulated battery and can be used for both indoor and outdoor applications such as home alarm systems, power toys, lawn maintenance equipment and more. The overall size of the battery is 7.72 inches long, 5.16 inches wide and 6.34 inches high, allowing for easy installation into most spaces. The terminals are screw-in style as opposed to loop terminals.

Pros

  • Affordable price range
  • Size is smaller, allowing to fit in most spaces
  • Lightweight design at 23lbs.
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    Screw-in terminals are not brittle like other batteries
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    Can set up with multiple batteries for added voltage
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    Can last from 10 to 17 hours

Cons

  • Not for extended one-time use, will need charging more often
  • Only 33 Ah rating
  • Carrying handle is made of light plastic; not very sturdy
  • Must be careful not to overcharge—could ruin the battery easily
  • Loses charge when sitting idle for long periods
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    Not for heavy duty uses

9. Optima Batteries 8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery

This battery is designed for use as both a starting battery as well as a deep cycle battery. Ideal uses include marine use and large RV’s where there are many accessories running as well. With the Optima Starting and Deep Cycle Battery you will be able start your vehicle in even harsh weather conditions and still have the convenience of a constant power source. It can be mounted in any position needed because it will resist shock and vibration fifteen times more than similar models. The terminals are screw-in type and come with safety covers. The battery weighs around 43lbs. which is moderate and measures 6.88 x 10 x 7.8 inches—surprisingly small for a battery with this capacity. It promises up to five times more recharges than most other batteries.

Pros

  • Dual purpose—need only one type of battery for starting and deep cycle
  • Terminals are strong and sturdy with covers for protection
  • Average weight around 43lbs. means easy to transport
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    Can get five times more cycles than other similar battery products
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    Mount in any position; spill-proof
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    Maintenance free battery
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    Great for heavy duty uses
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    Multiple batteries can be connected for more power
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    Reserve of about 120 minutes of power
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    750 Cold Cranking Amps

Cons

  • Higher than average price range
  • No cables included
  • Smaller size may be misleading about power capability
  • Seems to start to lose power holding capability after about a year
  • No carrying handles
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    Only 55Ah which is low for heavy duty usage

10. Interstate Batteries Sealed Lead Acid (AGM) Deep Cycle Battery

This average size AGM deep cycle battery made by Interstate Batteries is a reliable power option for things like lawn tools and equipment, medical devices, lighting systems and more. It weighs around 23lbs. and measures 7.7 x 5.2 x 6.3 inches which means it will fit well into most dedicated spaces. The carrying handle built-in to the top makes it easy to transport around as needed. These batteries are quick to charge and have an amp hour rating of 35Ah which means about 15 to 17 hours of usage.

Pros

  • Affordable price range
  • Compact size means it will fit into most spaces
  • Lightweight for easy transport
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    Fast charging
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    Carrying handle built-in for ease of use

Cons

  • No cables are included; must screw in power source to the battery
  • Handle is very light duty, could break easily
  • Only 35Ah which means you won’t get long periods of use at one time
  • After about a year they start to lose power easier/won’t hold charge as well

Charging and Deep Cycle Battery Maintenance

When you are purchasing a deep cycle battery, it is important to be aware that you will need to charge the battery eventually since it is not meant to last forever and not all deep cycle batteries are created equally. You will need to learn about charging your battery properly and how to best maintain your battery to get the most shelf life out of it as possible.

In the Beginning...

When you first bring home your deep cycle battery, for whatever your intended use, it is a good idea to only cycle the battery lightly the first few times. This means only use about 20% of its capacity and then re-charge to full again. This is said to help complete the process of forming the plates in the battery. By doing this, you will help extend the life of your battery.

Charging

When you are charging a deep cycle battery there are some important points to know and remember to do so properly, safely and to ensure you don’t destroy the battery you have just purchased. Often people make errors in charging the battery which compromise the life span and then immediately blame the manufacturer. These key points will guide you in the process of charging your deep cycle battery properly and safely.

  • The battery will be warm/hot after charging. Allow it to cool before re-installing and using so the heat does not continue and possibly create corrosion
  • Ensure the type of charger you are using matches the type of battery you are charging (i.e. don’t charge a wet cell battery with a sealed charger and vice versa)
  • Quick short charging times only reduce the overall life of your battery; try to only charge once a day
  • You should “boost” charge any deep cycle battery which has been sitting idle for an extended period
  • Choose the right charger for your battery. According to batterystuff.com, “To calculate your total charge time, a good rule of thumb is to take the amp hour rating of the battery and divide by the charger rating (amps) and then add about 10% for the extra time to totally top off the battery.”
  • Low current chargers are good for things that might need charging over an extended time frame like cars or motorcycles in storage
  • High current chargers will give a more immediate charge for things like wheelchairs, trolling motors and lawn tractors
  • Different types of chargers include: waterproof—great for marine use and power optional chargers which act as power supplies as well as chargers—great for RV’ing
  • When charging, your battery should be disconnected and in a well vented area
  • Slow charging is best for deep cycle batteries; set your charger to trickle charge and select the correct voltage of your battery
  • When connecting the cables to charge, always connect positive to positive first
  • Overcharging can raise the risk of explosion of your battery

Maintaining a Deep Cycle Battery

Many deep cycle batteries claim to be maintenance free, which for the most part is true. However, you should still check in and ensure your battery is running at it’s top performance.

If you have an AGM, sealed battery, you can still check in on the fluid levels by popping the cap off (while wearing protective eyewear and gloves!) to have a look. If fluids are below the plates, simply add distilled water. This goes for other types as well.

Another key point in maintaining your deep cycle battery, is to make sure the terminals are clean and free of rust or corrosion. This could affect the quality of charge you get and thus affect the shelf life of your battery.

When your battery is not in use, it is a good idea to give it a charge every 30 days to keep your voltage up and alive. Most deep cycle batteries will lose some power over time when sitting unused. If you do want to put your battery into storage, always store it in a fully charged state as opposed to discharged. It could mean you won’t be able to charge it again if it sits discharge for too long.

An older battery will have different maintenance needs compared to a newer battery, even if they are the same brand. This means it will probably take longer to charge the battery and that fluid levels will drop more rapidly. Monitor fluid levels in older batteries more carefully.

In Conclusion…

When you start looking for a deep cycle battery, for whatever your needs, it is important to do your research. There are so many options available to you, but you will want to match the exact battery to your intended purpose. You cannot always base your decision on price point either, since different batteries will power up various items. If you want to get the proper power for your device or equipment, you will need to match the output of power in the battery to your needs. Be prepared and have a charger for your new battery as well, to ensure you are not without power.

Our top pick for the job is the Vmaxtanks Vmaxslr125 AGM Deep Cycle 12v 125ah SLA rechargeable Battery with its 125Ah rating and super fast charging time. This battery will give you hours and hours of use before needing to be charged and promises many cycles of use overall. You can use it for both light duty and heavy duty uses.

Hopefully this buying guide for deep cycle batteries has been helpful and informative. Please leave any comments or questions you may have, we love to hear your feedback, as always.

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