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Best Group 51 Battery

Best Group 51 battery
Best Group 51 battery

Are you getting riled up with the performance of your car battery? Is it not starting your car in the first place or simply having breakdowns during summer weather? If such problems persist, you might need a changeover or a new battery for your vehicle. In this article, we will be talking about the best Group 51 Battery. We hope our guide will help you reap the full benefits.

It is necessary to fit an effective battery to power up your car. You will find different battery sizes in the market that can make your head spin. You must know what benefits your car to extract the best performance. 

Best Group 51 Battery – The Basics: What is Group Size

There are varying group sizes for battery measurements to fit different car models. The most common sizes range between 24, 24f, 25, 34, 35, 51, 51r, 52, 58, 58r, 59 and 65. This is where it gets tricky, and you must know the proportions that perfectly fit your vehicle without any impediment. 

Having the correct size will make sure your battery serves for a longer period. If your car holds a Group 51 battery, you are lucky to be here. Today, we will highlight the best 51R batteries, handpicked based on their performance, functionality, and durability.

Five Best Group 51 Battery Reviews

1. Optima Batteries OPT8073-167 D51R YellowTop Dual Purpose Battery

If your vehicle longs for deep cycling, this Optima OPT8073-167 D51R is the best option. This battery is one of the top group 51 batteries available. This power booster will give you top-notch performance regardless of weather conditions. You won’t have any problem starting your 4-wheeler from winter to summer. If your car is fitted with lots of external electronics, this battery will also suffice your needs.

Numerous positive features make this product top the charts. The good thing is that the battery has a reverse capacity of 66 minutes, which will give a constant performance to your car and back up the accessories in it. Even if you ride on bumpy roads, this item will not barge. It is made to resist vibration at will. 15 times more vibration resistant than other batteries, providing the durability you need.

It has a superior power-holding ability, even if you keep your vehicle idle for a long time. The starting power of this product is second to none, even in bad weather conditions. What else? This battery uses a unique spiral cell technology with individual spiral-wound cells, which provide clean, strong, and safer power to your car. This battery also features 450 cold-cranking amps for a flawless power boost.

Why Optima Batteries D51R YellowTop Dual Purpose Battery is our Top Pick

  • This is our top pick because of the deep cycling ability and cranking power.
  • It is super durable, spill-proof, and mountable in any position.
  • It has faster charging and 300+ discharging cycles.
  • It has a 3x longer lifespan than other batteries, and it can run without maintenance.


  • Maintenance-free
  • Vibration and shock-resistant 
  • Optimal cranking and deep cycling ability
  • High power-holding ability even when idle
  • Works fluently during extreme cold temperature
  • Simplified recharging
  • Low self-discharge rate


  • The warranty is not up to the mark. Make sure you buy it from an authorized dealer.

2. Delphi BU9051P MaxStart AGM Premium Automotive Battery, Group Size 51P

To implement the best power input to your car, use the Delphi BU9051P MaxStart AGM battery. This high-quality unit is crafted to suffice your requirements and juice up your car in the best possible way. You can rely on Delphi products. they have been manufacturing high-grade powering devices for vehicles, and people worldwide have been extracting benefits from them. 

This is a product that not only provides power to your car but all the accessories and electronic devices accustomed to it. From the stereo system, air conditioners, and lighting systems to many more. It has 325 CCA for a superior boost to all the electronics. The cold-cranking amps deliver the best surge and let the battery run without a hitch. This item has a reverse capacity of 60, which is adequate to function even during cold conditions.

With this power unit, you no longer need to worry about weather changes. Just fit it in and let it perform magic. This rigid group 51 battery withstands vibrations and shocks from the road up to 20x better than conventional batteries. A prime feature any car lover would cherish. The body is constructed to resist corrosion and ensures a manifold venting system to remove heat. The optimized component compression and fortified posts, welds, and straps add to its sturdiness. 

Why Delphi BU9051P MaxStart AGM Premium Automotive Battery is our Top Pick

  • We enlisted this battery because of its ability to perform in varying weather.
  • It will boost your car and other electronics in no time and work efficiently throughout.
  • It has a better cycle life and faster recharging ability than most batteries. If you are looking for maximum power, this is it. 


  • Durable battery
  • Extended cycle life
  • Fast discharge rate, recharges faster
  • Exact OEM AGM fit replacement
  • Shields from damage
  • Withstands vibration


  • Not suited for deep cycling
  • Charge holding capability is not up to the mark

3. ACDelco Gold B24R 24 Month Warranty Hybrid Vehicle AGM BCI Group 51 Battery

This battery certainly packs a punch. If you want something that is durable and has the best performance, grab the ACDelco Gold B24R AGM group 51 battery. This unit is made to power your vehicle through and throughout. This is an AGM battery, and you can’t go wrong with it. AGM batteries have low internal resistance and produce high currents whenever necessary. The B24R does its best and has a longer serving life.

It is capable of holding a high-capacity charge. Even when idle, it will preserve the state and start working when you need ignition. This battery shields from road vibrations and shocks and keeps it safe no matter what it must endure. It has a spill-proof body that makes it more durable. The cycle life of this battery is maximized with optimized calcium alloy, which provides a fine-grain corrosion-resistant grid for better protection.

The shelf life of this battery is comparatively higher than most available items on the marketplace. The battery’s power output is supreme due to the valve-regulated recombinant technology, which cranks up power three times more than regular batteries.

It has lead-proof pressurized valves ensuring top-of-line performance, and you can rely on it for as long as it is connected to your vehicle. The water consumption on this battery is curbed to finer limits, making it last longer. The advanced protective design of the terminals adds to the sturdiness.

Why ACDelco Gold B24R AGM BCI Group 51 Battery is our Top Pick

ACDelco Gold tops our list because of its affordability and functionality. It is not only limited to Toyota Prius, but it also works with most smart key-operated cars, and the assembly is convenient.


  • Holds charge for a longer period
  • Sturdy battery
  • Fast and easy installation
  • Vibration resistant
  • Longer shelf life
  • Low maintenance
  • Affordable


  • Works best for Toyota Prius
  • Smaller terminals compared to standard size

4. XS Power D5100R XS Series 12V 3,100 Amp AGM High Output Battery

Xs Power D5100R is built with superlative AGM technology to ensure the masterstroke you need for your car. Absorbed glass matt technology ensures your car doesn’t hit the stumbling block. The durability of this battery is fairly decent, not the best like our previously reviewed products, but it gets the job done

This battery can be mounted in any position, giving you flexibility. It has an internal ultra-low resistance feature, making it work efficiently. Some safety features include regulated valves, which prevent the movement of electrolytes inside the container which traps the hydrogen close to the plates, making it readily available for recombination when recharging.

The sealed body construction aids in low maintenance. It charges faster and can resist different climates due to the enclosure. The spill-proof design holds the liquid inside the capillary to avoid splashing of the liquid. Vibration-resistant construction can withstand jolts and hits while cruising. All these characteristics make this unit a hardwearing product, which is essential for a car battery. 

Why XS Power D5100R XS Series AGM High Output Battery is our Top Pick

  • We like this product because it is easy to move and install and can be put up in any position you prefer.
  • It withstands different weather hazards and shields from vibrations as well.
  • It is a great catalyst to start a car. This is an effective unit for any car enthusiast. 


  • Faster startup
  • Vibration-resistant and shockproof
  • Spill-proof
  • Requires low maintenance
  • Fast charging
  • It can be mounted in any position
  • Provides extra power
  • Low internal resistance
  • Improves electronic functions


  • It doesn’t last long like other top-tier batteries
  • Warranty is limited. Make sure you buy from an authorized shop.

5. Optima Batteries 8071-167 D51 YellowTop Dual Purpose Battery

This battery is a good choice for car enthusiasts who prefer deep cycling their battery. Optima Batteries is a renowned brand that makes high-quality vehicle powering units. The 8071-167 D51 from Optima is a worthy product on this list. A device built to generate enough juice for your cars and all other electrical components in it. 

From headlights to speakers, you name it, this battery can carry them all. With its reliable power source, you have very little to worry about. It is a low-maintenance device, cutting out your excessive work. This power box is very durable. It has vibration and shock-resistant features, letting you drive on any surface without worrying. Take a chill pill for bad weather and let this product do the work for you. It can efficiently work during summer and cold temperatures.

The 450 cold-cranking amps provide an uplift in low temperatures. The starting power is commendable in bad weather. The reverse capacity of 66 gives it the consistency you have been looking for. This ensures all other components in the car are backed up.

The build quality is top-notch; it can resist vibration at will. The power-holding ability is one of the better features. Even if you keep your car idle for longer, it can still run the wheels whenever you prefer. It has a low discharge rate and can be charged faster for your convenience. The splash-proof feature further adds to the longevity of the battery.

Why Optima Batteries D51 YellowTop Dual Purpose Battery is our Top Pick

A good cranking power, fast charging ability, efficient power supply, and deep cycling potential make it a product to be reckoned with. It is an impressive, durable, and hands down reliable power unit.


  • Low self-discharge rate
  • Works well during cold temperatures
  • Spill-proof design
  • Shock and vibration-resistant
  • Dual-purpose battery
  • Minimum maintenance


  • Priced higher than most batteries.

Best Group 51 Battery – Which is the Best For You?

To make things easier for you, we have enlisted our top pick in the following chart, the best 3 Group 51R Battery, and why you should go for these items.

1. Optima Batteries OPT8073-167 D51R

You should pick this one because it requires very low maintenance. It is an efficient battery even during subzero temperatures. It has a fairly low self-discharge rate and faster charging capability. This is one hell of a sturdy product, being shockproof and spill-resistant.

2. Delphi BU9051P MaxStart

A very good battery if you are looking for a fluent start. The cold-cranking ability is very efficient during chilly temperatures. The construction shields from damage and vibration from being hardwearing. This battery has an extended cycle life.

3. ACDelco Gold B24R 

We cherry-picked this product because of the easy installation process, longer shelf life, and affordability. It has a superior charge-holding capacity. The built quality is tough, which resists shocks and road vibrations at will.

Best Group 51 Battery – Benefits of Buying One of the Best

If your vehicle embraces a Group 51 battery, you should only go for the best, not cheap items. Remember, this is a powering unit to boost up your precious car. Here, you cannot compromise with the quality. The products we have mentioned have numerous advantages over any other battery. 

First and foremost, they are easy on the assembly and provide speedy bootup to your car. The batteries have minimal internal resistance and a low self-discharge rate, making them fast-charging units. The big advantage is that they need zero or negligible maintenance, saving time and money.

They come with longer shelf life, destined to last longer than their compatriots. They are solidly built and are spill-proof and shock-resistant. 51R batteries have very good safety features, making them one of the most desired battery types among automobile enthusiasts.

Best Group 51 Battery – Buying Guide

Buying guide of Group 51 Battery

Picking a car battery is not a simple task. You need to consider many things to ensure you have the best powering device. Let’s check out what needs to be considered while buying the best Group 51 batteries.

Manufacture Date

Always make sure your battery lifespan is within range. Batteries will inevitably lose their overall strength with time. We recommend you buy a new unit. Checking the manufacture date is easy. Batteries come with a code that includes letters and numbers indicating the date they were made. Don’t buy something that has surpassed 6 months from the mentioned date. 


You must get a battery that fits your vehicle. A smaller size might not serve your car; similarly, larger batteries might not fit a smaller casing. The correct size battery should have proper terminal locations. This is important to fit the cable in place; otherwise, there will be a loose connection. Check the user manual and be sure of the battery size your car needs.

Technical specifications

This is one important aspect you can’t overlook. You must know your battery’s reverse capacity, which helps estimate how long a fully charged battery can deliver. The CCA is also important to point out. The better the cold-cranking amps, the better it can start the car in low temperatures. The optima in our number one ranking has a reverse minute of 66 minutes and CCA of 450, which is a viable option to power your car.


You should get a sturdy product to fit your engine compartment. Get a device that can withstand damages from road vibrations and stay unaffected during heavy shocks. The components should be hardwearing to make them last longer. Simply go through our product reviews. We have mentioned a selection of durable products for your convenience.

Carrying Handle 

Batteries that come with carrying handles and straps are safer to carry. This feature gives them the flexibility to be carried around easily. For example, the ACDelco in our list comes with a built-in handle, so you can easily move the unit from one place to another, and more importantly, it helps to install the battery in the engine compartment comfortably.


Check for the warranty when you go on to buy a battery. A battery with a warranty will likely assure you that if something goes wrong, it can be changed and fixed by the manufacturer and authorized dealers. If you damage the product by neglecting it, that won’t comply with the warranty.


The price range for Group 51 batteries varies a lot. Obviously, it all depends on how much you are willing to spend. We ask you to buy a unit that will not hurt your expenses, and remember, don’t buy cheap. Go for affordable ones instead. You will find a wide range of items in our review list. Check them out.

Best Group 51 Battery FAQs

What Is a Group 51 Battery?

Group 51 batteries are mostly AGM and SLA batteries that are made to resist road vibrations. Group 51 batteries have a stable power source and can be used as general or auxiliary batteries for various applications.

What Is the Difference Between A 51 And 51R Battery?

The key difference between 51 and 51R is the reversed terminals.

What Cars Can Use a Group 51 Battery?

Group 51 batteries fit into almost every car compartment. Cars like Nissan, Toyota, Honda, and other Japanese cars can use this type of battery.

What Size Is a Group 51 Battery?

The physical dimensions of group 51 batteries range very close to dimensions such as 9.374×5.0625×8.8125 inches.

How many amp-hours is a Group 51R Battery?

Most group 51 batteries range between 36-45 ampere-hours with a reverse capacity between 65-75 minutes.

Who makes the best 51R battery?

Brands like Optima and ACDelco manufacture some of the best 51R Battery.

Best Group 51 Battery – Final Words

If you were digging for the best Group 51 battery, you have probably got the answer through this article. We strongly recommend Optima and ACDelco items on our list. The mentioned products are all top-of-the-line batteries with premium performance. These are heavy-duty batteries, vibration resistant, need low maintenance, have extended shelf life, and much more.

All you need to do now is look for what your car desires. Check the items physically and test them yourself. Cut out the time-wasting. Rack up a unit from our mentioned catalog and put on the ignition like never before.