The first thing that struck me about the Mighty Max YTX20L-BS Battery for Polaris RZR 800 wasn’t just its compact size but how reliably it handled demanding loads during testing. It’s a sealed, maintenance-free AGM battery, which means no fuss and no leaks—perfect for rugged RZR adventures. I was particularly impressed by its ability to start in extreme weather, from scorching heat to freezing cold, thanks to its solid construction and high Cold Cranking Amps.
After comparing it with gel and other lead-acid options, the Mighty Max YTX20L-BS proved to deliver the best mix of power, durability, and ease of use. Unlike the gel model, it offers reliable, consistent performance without the worry of temperature sensitivity. And it outperforms other lead-acid batteries in durability, thanks to its shock and vibration resistance. Honestly, for those seeking a dependable, high-capacity replacement, this battery stands out as a smart choice from my hands-on experience. It’s a worthy upgrade for your RZR 800 and a proven performer in tough conditions.
Top Recommendation: Mighty Max YTX20L-BS Battery for Polaris RZR 800 (08-14)
Why We Recommend It: This battery offers 12V, 18AH capacity, and 270 Cold Cranking Amps, delivering strong, consistent starts even in harsh climates. Its sealed AGM design resists shocks, vibrations, and temperature extremes better than gel or traditional lead-acid options. While the gel battery provides longer charge retention, the Mighty Max YTX20L-BS’s superior durability, high CCA, and affordability make it the best overall replacement.
Best polariz rzr 800 replacement battery: Our Top 4 Picks
- Mighty Max YTX20L-BS Battery for Polaris RZR 800 (08-14) – Best Polariz RZR 800 Replacement Power Pack
- Mighty Max YTX20L-BS Gel Battery for Polaris RZR 800 (08-14) – Best Lead Acid Battery for RZR 800
- AJC Battery for Polaris Ranger RZR S 800 UTV (2010-2014) – Best OEM Replacement Battery
- Mighty Max Battery YTX20HL-BS 12V 20AH SLA Replacement – Best Lithium Battery for RZR 800
Mighty Max YTX20L-BS Battery for Polaris RZR 800 (08-14)
- ✓ Weatherproof and durable
- ✓ Reliable cold cranking power
- ✓ Maintenance free design
- ✕ No mounting accessories included
- ✕ Slightly larger than some stock batteries
| Voltage | 12 Volts |
| Capacity | 18 Ah (Ampere-hours) |
| Cold Cranking Amps (CCA) | 270 CCA |
| Dimensions | 6.88 inches x 3.50 inches x 6.13 inches |
| Sealed Lead Acid (SLA) | Yes, maintenance-free and sealed |
| Additional Features | Weatherproof, vibration resistant, rechargeable, can be mounted in any position |
Many assume that replacing a battery in a Polaris RZR 800 is just a matter of fitting any standard lead-acid unit. But I found out the hard way that not all batteries are created equal, especially when it comes to rugged off-road use.
The Mighty Max YTX20L-BS instantly stood out with its solid build and weatherproof design.
This battery is a beast when it comes to handling tough conditions. I took it through rain, snow, and dusty trails, and it powered through without a hiccup.
The sealed, maintenance-free design means you don’t have to fuss with water or acid levels, which is a huge time-saver.
Its dimensions fit perfectly in the stock compartment, and the polarity markings are clear. The compact size combined with the 18AH capacity and 270 CCA gives you reliable starting power every time.
Plus, the fact that it’s rechargeable and can be mounted in any position makes installation straightforward.
Handling heavy electrical loads was no problem, whether I was running lights, a stereo, or other accessories. The vibration and shock resistance means it stays reliable even on rough terrain.
Overall, it’s a dependable choice that delivers consistent performance, backed by a full year warranty.
If you’re tired of weak, unreliable batteries that leave you stranded, this one might just change your mind. It’s a solid investment for keeping your RZR ready to roll, no matter what the trail throws at you.
Mighty Max YTX20L-BS Gel Battery for Polaris RZR 800 (08-14)
- ✓ Reliable cold starts
- ✓ Long-lasting charge
- ✓ Vibration resistant
- ✕ Slightly higher price
- ✕ No quick-release terminals
| Voltage | 12V |
| Capacity | 18Ah |
| Cold Cranking Amps (CCA) | 270 CCA |
| Battery Type | Gel (Maintenance Free) |
| Design Features | Non-spillable gel paste, vibration and shock resistant |
| Temperature Range | Operates reliably in extreme temperatures |
I was surprised to find that this Mighty Max YTX20L-BS gel battery fits my Polaris RZR 800 so snugly, almost like it was made for it. It’s surprisingly compact for an 18AH gel battery, yet it packs a punch with 270 CCA.
The moment I installed it, I noticed how solid and sturdy the casing felt—no flimsy plastic here.
What really caught me off guard was how lightweight it is compared to older lead-acid batteries I’ve used. Handling it felt effortless, but don’t let that fool you—its durability in rough terrain is impressive.
I took the RZR out on a bumpy trail, and the battery stayed rock solid, thanks to its vibration-resistant design.
The gel technology isn’t just a buzzword—it genuinely delivers consistent power, even in extreme weather. I tested it in a hot summer and a chilly winter, and it kept starting reliably every time.
Plus, the maintenance-free aspect means no fuss with acid levels or spills, which is a huge plus for safety and convenience.
Overall, I found this battery to be a trustworthy upgrade. It’s built tough, performs well across climates, and offers peace of mind with its leak-proof design.
If you’re tired of weak starts and constant maintenance, this might just be your new best friend for your RZR.
AJC Battery for Polaris Ranger RZR S 800 UTV (2010-2014)
- ✓ Fully sealed and charged
- ✓ Maintenance-free AGM tech
- ✓ Reliable cold-start power
- ✕ Slightly higher price
- ✕ No included mounting hardware
| Battery Chemistry | Maintenance-free AGM (Absorbent Glass Mat) |
| Cold Cranking Amps (CCA) | 385 A |
| Voltage | 12 Volts |
| Terminal Type | B terminal |
| Replaces | YIX30L-BS, YIX30L, YTX30L-BS, YTX30L, and other compatible models |
| Design | Factory activated, fully sealed, charged, and ready to use |
This AJC battery has been sitting on my wishlist for a while, mainly because I’ve heard so many good things about OEM replacements for the Polaris RZR S 800. When I finally got my hands on it, I was eager to see if it lived up to the hype.
The first thing that caught my eye was how sleek and compact the battery is, yet it feels solid and well-made in your hand.
It arrives fully sealed and charged, so I didn’t have to mess around with adding water or acid. The AGM technology is a huge plus, especially for a UTV that takes a lot of vibration and rough handling.
Installing it was straightforward—just a quick swap, and it fit perfectly with the factory terminals, which are clearly marked for easy connection.
During my test rides, I noticed that it cranked the engine instantly every time, even after long periods of inactivity. The 385 CCA is reliable enough for cold starts and ensures your UTV fires up without any hesitation.
The fact that it’s maintenance-free means I don’t have to worry about checking fluid levels or topping off water, which is a relief after a long day on the trail.
Overall, this battery feels like a dependable replacement that’s built to last. It’s compact, powerful, and ready to go right out of the box.
Whether you’re replacing an old battery or upgrading for better performance, this one ticks all the boxes. Plus, the wide compatibility list means you’re covered even if you switch models.
Mighty Max Battery YTX20HL-BS 12V 20AH SLA Replacement
- ✓ Strong cold cranking power
- ✓ Weatherproof and durable
- ✓ Maintenance-free design
- ✕ No mounting hardware included
- ✕ Slightly heavier than some competitors
| Voltage | 12 Volts |
| Capacity | 20 Amp-Hours (AH) |
| Cold Cranking Amps (CCA) | 310 CCA |
| Dimensions | 6.88 inches x 3.50 inches x 6.13 inches |
| Sealed Lead Acid (SLA) / AGM | Yes |
| Mounting Position | Any position, vibration resistant |
There I was, knee-deep in mud and gravel, trying to get my Polaris RZR 800 fired up after a long winter layoff. I reached into the storage compartment and grabbed the Mighty Max YTX20HL-BS, feeling the sturdy weight of it in my hand.
The compact size and robust build instantly gave me confidence, knowing this battery was built tough for rough conditions.
As I installed it, I noticed how easy it was to handle—no fuss, no mess. The sealed design means I didn’t have to worry about spills or corrosion, even as I mounted it in a less-than-perfect spot.
Once connected, the instant power surge was noticeable. The 310 Cold Cranking Amps kicked in strong, firing up the engine without hesitation.
Throughout the ride, I appreciated how well it handled vibration and shocks, thanks to its AGM construction. Rain or shine, the weatherproof reliability kept my Polaris running smoothly.
The fact that it’s maintenance-free is a huge plus—no topping up acid or worrying about leaks. After a few rides, I could tell this battery is built to last, offering more reliable starts over time and reducing wear on my engine.
Bottom line? This battery packs a punch and was exactly what my RZR needed.
It’s a solid upgrade for anyone serious about performance and durability in tough terrains. The only hiccup?
It doesn’t come with mounting hardware, so be sure to have screws handy.
What Should I Consider When Choosing a Replacement Battery for My Polaris RZR 800?
When choosing a replacement battery for your Polaris RZR 800, several key factors should be considered to ensure optimal performance and longevity.
- Battery Type: The most common types are lead-acid and lithium-ion batteries, each with its own advantages and disadvantages.
- Cold Cranking Amps (CCA): This measurement indicates the battery’s ability to start the engine in cold conditions, which is crucial for reliable performance.
- Size and Fit: Ensuring the replacement battery fits properly in the designated compartment is vital to avoid any mechanical issues.
- Maintenance Requirements: Some batteries require regular maintenance, while others are maintenance-free, which can affect your decision based on your lifestyle.
- Brand Reputation: Choosing a battery from a reputable brand can provide assurance of quality and reliability.
- Warranty Period: A longer warranty can be an indicator of the manufacturer’s confidence in their product and can provide peace of mind.
The battery type is critical as lead-acid batteries tend to be more affordable but heavier, while lithium-ion batteries offer a lightweight alternative with longer lifespans and faster recharge times.
Cold Cranking Amps (CCA) is particularly important for off-road vehicles like the RZR 800, as they often face challenging weather and terrain conditions that can make starting the engine more difficult.
Size and fit cannot be overlooked; a battery that does not fit securely can lead to poor performance, vibrations, and potential damage to the vehicle’s electrical components.
Maintenance requirements vary significantly among battery types, with maintenance-free options being ideal for users who prefer low-maintenance solutions, while traditional lead-acid batteries might require electrolyte checks and topping off.
Brand reputation plays a significant role in ensuring you choose a reliable battery, as established brands typically offer better customer service and product support.
Finally, considering the warranty period is essential, as a longer warranty can save you money in the long run and indicates the manufacturer’s commitment to their battery’s quality and durability.
Which Types of Batteries Are Compatible with the Polaris RZR 800?
The best Polaris RZR 800 replacement battery options include several types of batteries that vary in performance, longevity, and compatibility.
- AGM (Absorbent Glass Mat) Batteries: AGM batteries are sealed, maintenance-free, and offer high resistance to vibration and shock. They provide excellent power output and have a longer lifespan compared to traditional lead-acid batteries, making them a popular choice for off-road vehicles like the RZR 800.
- Gel Batteries: Gel batteries use a silica-based electrolyte, which makes them spill-proof and safer for various orientations. They are also known for their deep cycle capabilities, which means they can handle repeated discharges without significantly degrading, making them suitable for the demands of the RZR 800.
- Lead-Acid Batteries: Traditional lead-acid batteries are widely available and generally less expensive, but they require regular maintenance and have a shorter lifespan. They are known for their reliable performance in starting engines but can be less durable in extreme conditions compared to AGM and gel options.
- Lithium-Ion Batteries: Lithium-ion batteries are lightweight and offer high energy density, providing more power with less weight. They have a longer lifespan and faster charging times, making them an innovative choice for performance enthusiasts looking to upgrade their RZR 800’s battery system.
- Maintenance-Free Batteries: These batteries are designed to be sealed and do not require water topping, which reduces maintenance effort. They often come in AGM or gel formats and are tailored for longevity and reliability, making them an excellent fit for the RZR 800’s demands.
How Do Battery Specifications Impact the Performance of My Polaris RZR 800?
The performance of your Polaris RZR 800 is significantly influenced by the specifications of its battery.
- Cold Cranking Amps (CCA): The CCA rating indicates how well a battery can start an engine in cold temperatures. A higher CCA is essential for the RZR 800, especially if you operate in colder climates, as it ensures reliable starting power regardless of the temperature.
- Reserve Capacity (RC): Reserve capacity measures the battery’s ability to run electrical accessories when the engine is off. A battery with a higher RC allows you to power added features, such as lights or audio systems, without draining the battery too quickly, which is crucial for off-road adventures.
- Battery Type: The choice between lead-acid, AGM (Absorbent Glass Mat), or lithium batteries can greatly impact performance and longevity. AGM batteries are known for their durability and resistance to vibration, making them ideal for off-road use, while lithium batteries offer lighter weight and faster charging capabilities.
- Voltage: The standard voltage for a Polaris RZR 800 battery is 12 volts. It’s important to ensure that any replacement battery matches this voltage to maintain proper electrical system function and prevent damage to onboard electronics.
- Dimensions and Weight: The physical size and weight of the battery affect how well it fits in the RZR 800’s battery compartment. A battery that is too large or heavy can lead to installation issues or affect the vehicle’s handling and performance on rough terrain.
What Are the Top Brands for Polaris RZR 800 Replacement Batteries?
The top brands for Polaris RZR 800 replacement batteries include several reputable manufacturers known for quality and performance.
- Optima Batteries: Optima is renowned for its high-performance AGM batteries that provide superior starting power and deep cycling capabilities. Their batteries are designed to withstand extreme conditions and vibrations, making them ideal for off-road use in vehicles like the Polaris RZR 800.
- ACDelco: ACDelco offers a range of durable batteries that are well-suited for various vehicles, including ATVs and UTVs. Their batteries feature robust construction and are designed for reliable performance, making them a popular choice for RZR owners seeking dependable power sources.
- Odyssey Battery: Odyssey batteries are known for their long life and high reserve capacity, delivering exceptional power for starting and accessory use. Their advanced AGM technology allows for fast recharge times and superior performance in extreme temperatures, which is important for off-road adventures.
- Shorai: Shorai specializes in lithium iron phosphate batteries, which are significantly lighter than traditional lead-acid batteries. This weight reduction enhances the performance and handling of the RZR 800, while their fast recharge capability makes them a favored choice among performance enthusiasts.
- Yuasa: Yuasa is a well-established name in the battery industry, providing reliable batteries for a range of vehicles, including UTVs. Their batteries are designed to offer consistent performance and longevity, making them a trusted option for Polaris RZR 800 owners.
How Can I Maintain My Polaris RZR 800 Battery for Longevity?
To maintain your Polaris RZR 800 battery for longevity, consider the following practices:
- Regular Charging: Ensure that your battery is regularly charged, especially during long periods of inactivity.
- Clean Terminals: Keep the battery terminals clean and free from corrosion to ensure optimal conductivity.
- Check Electrolyte Levels: Regularly check and maintain the electrolyte levels in a lead-acid battery to prevent damage.
- Use a Battery Maintainer: Employ a battery maintainer during the off-season to keep the battery at an optimal charge level.
- Proper Storage: Store the battery in a cool, dry place when not in use to avoid extreme temperatures that can harm the battery.
Regular Charging: Keeping your battery charged is crucial, especially if your RZR is not used frequently. A fully charged battery maintains its health and prevents sulfation, which can occur if the battery is left in a discharged state for too long.
Clean Terminals: Corrosion on battery terminals can create resistance that limits power flow. Regularly cleaning the terminals with a mixture of baking soda and water can help maintain a good connection and prolong battery life.
Check Electrolyte Levels: For lead-acid batteries, maintaining the proper electrolyte level is essential to prevent the plates from being exposed. If levels are low, adding distilled water can help restore function and prevent deterioration.
Use a Battery Maintainer: A battery maintainer helps to keep the battery at an optimal charge level without overcharging. This is particularly beneficial during winter months or prolonged periods of inactivity, ensuring your battery is ready when you need it.
Proper Storage: Storing the battery in a cool and dry environment can prevent damage from extreme temperatures. Extreme heat can accelerate battery fluid evaporation, while cold can cause the battery to freeze, both of which can significantly reduce the lifespan of your battery.
What Signs Indicate That My Polaris RZR 800 Battery Needs Replacement?
Several signs can indicate that your Polaris RZR 800 battery needs replacement:
- Slow Engine Cranking: If you notice that the engine takes longer to start or cranks more slowly than usual, it may be a sign that the battery is losing its charge.
- Dim Lights: When your headlights or dashboard lights appear dim, this can indicate that the battery is not providing sufficient power, suggesting it may need to be replaced.
- Corrosion on Battery Terminals: Visible corrosion or buildup around the battery terminals can point to a failing battery, as this can affect its ability to hold a charge effectively.
- Frequent Jump Starts: If you find yourself needing to jump-start your RZR frequently, this is a clear indicator that the battery is no longer able to hold a charge and should be replaced.
- Battery Age: Most batteries have a lifespan of 3 to 5 years. If your battery is nearing or has surpassed this age, it may be time to consider a replacement, regardless of its current performance.
Slow engine cranking often occurs when the battery’s internal components are worn out, leading to insufficient power being delivered to the starter motor. This can be particularly noticeable in colder weather when batteries tend to lose their efficiency.
Dim lights can be a direct result of insufficient voltage being supplied by the battery. If you notice that the lights brighten when the engine is running but dim when it’s off, it might indicate that the battery isn’t holding a charge well.
Corrosion on battery terminals is not only a sign of battery wear but can also lead to poor electrical connections. Cleaning the terminals might help temporarily, but persistent corrosion usually indicates that the battery is failing and should be replaced.
Frequent jump starts indicate that the battery is unable to retain its charge, which is a clear sign of deterioration. If you’re relying on jump-starting as a regular solution, your battery is likely nearing the end of its life cycle.
Considering the age of the battery is crucial; even if it seems to work fine, older batteries are more prone to failure. Regularly inspecting the battery and keeping track of its age can help prevent unexpected breakdowns.
Where Can I Find the Best Replacement Batteries for Polaris RZR 800?
The best replacement batteries for the Polaris RZR 800 can be found through various reputable sources.
- Online Retailers: Websites like Amazon, eBay, and Walmart offer a wide selection of replacement batteries for the Polaris RZR 800, often with customer reviews and ratings to guide your choice.
- Specialty Powersports Stores: Stores that specialize in powersports equipment, such as Cycle Gear or ATV stores, often carry high-quality batteries specifically designed for the Polaris RZR 800.
- Manufacturer’s Website: The official Polaris website provides original equipment manufacturer (OEM) batteries, ensuring compatibility and quality for your RZR 800.
- Local Auto Parts Stores: Many local auto parts retailers, such as AutoZone or O’Reilly Auto Parts, stock batteries that can fit the Polaris RZR 800, and staff may assist you in finding the best option for your needs.
- Battery Specialty Shops: Stores specializing in batteries, such as Batteries Plus Bulbs, can offer expert advice and often carry high-performance batteries suited for off-road vehicles like the RZR 800.
Online retailers provide convenience and often competitive pricing, allowing you to compare different brands and specifications quickly. They typically include customer feedback, which can help you choose a reliable battery.
Specialty powersports stores focus solely on vehicles like the RZR 800, ensuring that the batteries they sell are suitable and durable for off-road conditions. Additionally, staff at these locations can offer tailored recommendations based on your specific usage.
The manufacturer’s website guarantees that you are purchasing OEM parts, which are specifically designed for the RZR 800. This ensures a perfect fit and optimal performance, although they could be priced higher than aftermarket options.
Local auto parts stores are a great option for those who prefer in-person shopping and immediate availability. You can often find knowledgeable staff who can help you select the right battery based on your RZR’s needs.
Battery specialty shops focus entirely on battery technology and performance, offering a range of options from standard to high-performance batteries. They can provide valuable insights into the best choice for your RZR 800 based on your riding habits and frequency of use.
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