2015 Polaris Sportsman 570 Battery Size

There’s nothing worse. You’re geared up, miles from the trailhead, you turn the key on your Sportsman 570, and all you get is a sad little ‘click’. A dead battery can kill a day of riding before it even starts. We’ve all been there, and the frustration of tracking down the right replacement can be just as annoying.

We promise this guide will cut through the confusion. You’re about to get the definitive, no-nonsense answer on the 2015 Polaris Sportsman 570 battery size, but we’re not stopping there. This is more than just a part number; it’s your complete playbook for choosing the right power source for your rig.

In this comprehensive guide, we’ll cover the exact OEM battery size, explore powerful upgrade options for your accessories, walk you through a step-by-step installation, and share pro tips to make your next battery last for years. Let’s get that machine firing up with confidence.

What is the Correct 2015 Polaris Sportsman 570 Battery Size?

Let’s get straight to the point. The factory-specified, original equipment manufacturer (OEM) battery size for a 2015 Polaris Sportsman 570 is a YTX20L-BS.

This isn’t just a random string of letters and numbers. It’s a standardized code that tells you everything you need to know about the battery’s physical dimensions, terminal placement, and power output. Getting this right is critical for a drop-in fit and proper electrical connection.

OEM Specifications: Your Starting Point

The YTX20L-BS battery is the baseline Polaris engineered for your machine. It provides enough power to reliably start the engine and run the stock electronics under normal conditions. Think of it as the reliable daily driver of ATV batteries.

Dimensions (Approximate): 6.875 inches (Length) x 3.4375 inches (Width) x 6.125 inches (Height)
Voltage: 12 Volts
Cold Cranking Amps (CCA): Typically around 270-310
Terminal Configuration: The “L” in YTX20L-BS signifies that the negative terminal is on the left side when you’re looking at the front of the battery.

Why Size and Terminal Placement are Non-Negotiable

It might be tempting to grab a battery that’s “close enough,” but this is a common mistake we see at the shop. The battery tray on your Sportsman is designed for a precise fit. A battery that’s too large won’t fit, and one that’s too small will vibrate excessively, leading to premature failure.

Even more important is the terminal placement. Your ATV’s positive and negative battery cables are a specific length. If you buy a battery with the terminals reversed, the cables simply won’t reach. Forcing them can cause dangerous shorts or damage your wiring harness. Always double-check that the negative terminal is on the left.

Upgrading Your Battery: Power, Performance, and Key Considerations

Is the stock battery size always the best choice? Not necessarily. If you’ve added power-hungry accessories like a winch, LED light bars, a sound system, or heated grips, the stock battery can get overwhelmed quickly. This is where understanding battery technology provides huge benefits.

This section is your 2015 Polaris Sportsman 570 battery size guide to choosing the right power upgrade for your riding style.

Lead-Acid vs. AGM vs. Lithium: A Head-to-Head Comparison

The technology inside the battery case matters just as much as the size. Here’s a quick breakdown of your main options.

Conventional Lead-Acid (Flooded): This is old-school technology. These batteries are cheap but require regular maintenance (topping off with distilled water), are prone to spilling acid, and don’t handle the vibrations of off-roading well. We generally advise against these for any modern ATV.
AGM (Absorbent Glass Mat): This is the most common and practical upgrade. The acid is absorbed into fiberglass mats, making the battery spill-proof and highly vibration-resistant. AGM batteries offer better performance and a longer lifespan than flooded batteries. The OEM YTX20L-BS is an AGM battery.
Lithium (LiFePO4): This is the premium, high-performance option. Lithium batteries are incredibly lightweight (often saving 5-10 lbs), offer superior cranking power, and have a much longer service life. The downside is their higher upfront cost and sensitivity to being fully discharged or charged in freezing temperatures.

Cold Cranking Amps (CCA): What Do You Really Need?

CCA measures a battery’s ability to start an engine in cold weather (0°F / -18°C). The higher the CCA rating, the more starting power it has. While the stock 270-310 CCA is fine for most, if you ride in cold climates or have an engine with performance mods, opting for an AGM or Lithium battery with a higher CCA rating is a smart move.

Amp Hours (Ah): Fuel for Your Accessories

Think of Amp Hours as the size of your battery’s “gas tank.” It determines how long the battery can supply power to your accessories with the engine off. If you frequently use a winch or listen to your stereo while parked, a battery with a higher Ah rating will give you more runtime before it goes flat. Many high-performance AGM and Lithium batteries offer increased Ah capacity in the same YTX20L-BS physical size.

Step-by-Step Guide: How to Replace Your Sportsman 570 Battery

Ready to get your hands dirty? Swapping the battery on your 2015 Sportsman 570 is a straightforward job for any DIYer. Follow these steps for a safe and successful installation. This is how to 2015 Polaris Sportsman 570 battery size installation is done right.

Tools and Safety Gear You’ll Need

Before you start, gather your gear. Safety first, always!

Safety Glasses and Gloves: Protect your eyes and hands from potential acid or sparks.
Socket Set or Wrenches: You’ll likely need an 8mm and 10mm socket or wrench for the battery terminals and hold-down bracket.
Terminal Cleaning Brush: Essential for ensuring a good connection with the new battery.
Battery Tender/Charger: It’s a best practice to fully charge your new battery before installation.

Removing the Old Battery (Step-by-Step)

Locate the Battery: On most 2015 Sportsman 570 models, the battery is located under the seat. Remove the seat by releasing the latch at the rear.
Disconnect the Negative (Black) Terminal FIRST: This is the most important safety step. Use your 10mm wrench to loosen the nut on the negative (-) terminal. Once loose, wiggle the cable off the post and tuck it away from the battery to prevent accidental contact.
Disconnect the Positive (Red) Terminal: Now, you can safely remove the positive (+) cable. Loosen the nut and pull the cable off the post.
Remove the Hold-Down Bracket: There will be a bracket or strap holding the battery in place. Use your wrench (often 8mm or 10mm) to remove the bolt(s) securing it.
Lift the Old Battery Out: Carefully lift the battery straight up and out of the tray. Be aware that AGM batteries are heavy.

Installing the New Battery (Step-by-Step)

Clean the Battery Tray and Cable Terminals: Wipe out any dirt or debris from the battery box. Use your terminal brush to scrub the inside of the red and black cable connectors until they are shiny. A clean connection is key to performance.
Place the New Battery in the Tray: Lower your new, fully charged YTX20L-BS battery into the tray, ensuring the negative terminal is on the left side.
Secure the Hold-Down Bracket: Reinstall the hold-down bracket, making sure it’s snug enough that the battery cannot move or vibrate. Do not overtighten.
Connect the Positive (Red) Terminal FIRST: Now you’ll work in reverse. Attach the red cable to the positive (+) terminal and tighten the nut securely.
Connect the Negative (Black) Terminal LAST: Attach the black cable to the negative (-) terminal and tighten it. This is the final electrical connection. You might see a tiny, harmless spark as you make contact—this is normal.
Apply Terminal Protectant (Optional): A light coat of dielectric grease or battery terminal protector spray on the terminals can help prevent future corrosion.
Test Your Work: Put the key in the ignition and turn it to the ‘On’ position. You should see the display light up. Now, start the engine. It should crank over strong and fire right up! Reinstall your seat, and you’re ready to ride.

Common Problems with 2015 Polaris Sportsman 570 Battery Size and Solutions

Even with the right battery, issues can pop up. Here are some of the most common problems with 2015 Polaris Sportsman 570 battery size and power systems, and how to troubleshoot them.

Battery Draining Too Quickly? (Parasitic Draw)

If your battery dies after just a few days of sitting, you might have a parasitic draw. This means something is drawing power even when the key is off. This can be caused by faulty wiring or an accessory that’s not wired correctly. Tracking it down can be tricky, but a common culprit is a winch or stereo wired directly to the battery instead of through a keyed ignition source.

Corrosion on Terminals: The Silent Killer

Fuzzy, white, or greenish buildup on your battery terminals is corrosion. This acts as an insulator, preventing the full flow of electricity. It can cause hard starting, dim lights, and prevent the battery from charging properly. The fix is simple: disconnect the terminals (negative first!) and clean them thoroughly with a terminal brush and a baking soda/water solution.

Fitment Issues with Aftermarket Batteries

While most reputable brands stick to the YTX20L-BS standard, some budget brands can have slight variations in case size. Always measure your old battery and compare it to the specs of the new one before you buy. A small foam block can sometimes be used to snug up a slightly smaller battery, but it’s always best to get a perfect fit from the start.

2015 Polaris Sportsman 570 Battery Size Best Practices

Want to get the most life out of your new battery? A little proactive care goes a long way. This 2015 Polaris Sportsman 570 battery size care guide will help you maximize your investment.

The Importance of a Battery Tender

If you don’t ride your ATV every week, a battery tender (or smart charger) is the single best tool you can own. Unlike a trickle charger, a tender monitors the battery’s voltage and only applies a charge when needed. This prevents overcharging and keeps the battery in peak condition during storage, especially in winter.

Cleaning and Inspection Routine

Every few months, take a minute to pop the seat off and inspect your battery. Look for any signs of corrosion on the terminals, check that the connections are tight, and ensure the hold-down bracket is secure. A clean, tight connection is a happy connection.

Sustainable and Eco-Friendly Battery Disposal

ATV batteries contain lead and acid, which are hazardous materials. Never throw an old battery in the trash. When you buy a new battery, the auto parts store or dealership is required by law to accept your old one for recycling. This is the most sustainable 2015 Polaris Sportsman 570 battery size practice and ensures these materials are handled safely.

Frequently Asked Questions About the 2015 Polaris Sportsman 570 Battery Size

Can I use a car battery in my Sportsman 570?

Absolutely not. A car battery is physically massive and will not fit. More importantly, it’s not designed to withstand the intense vibration and jarring impacts of off-roading, which will lead to a very short and messy lifespan.

How long should my Sportsman battery last?

With proper care and regular use of a battery tender, a quality AGM battery should last between 3 to 5 years. A lithium battery can often last longer, from 5 to 8 years. Factors like climate, usage patterns, and accessory load all play a role.

What are the signs of a failing battery?

The most common signs are slow engine cranking, headlights that dim significantly when you try to start it, the digital display resetting, or the battery struggling to hold a charge for more than a day or two. If you experience these, it’s time for a replacement.

Is a more expensive battery always better?

Generally, you get what you pay for. Premium AGM and Lithium batteries from reputable brands like Yuasa, Odyssey, or Shorai often use higher-quality materials, which translates to better performance, more durability, and a longer life. For a machine you depend on, investing in a quality battery is one of the smartest 2015 Polaris Sportsman 570 battery size tips we can offer.

Choosing the right battery for your 2015 Polaris Sportsman 570 is about more than just finding a box that fits. It’s about understanding your power needs and making an informed choice that will keep your machine reliable for every adventure. By starting with the correct YTX20L-BS size and considering an upgrade if you run heavy accessories, you’re setting yourself up for success. Follow our installation and care guide, and you’ll spend less time troubleshooting and more time on the trail.

Now you’re armed with the knowledge to tackle this job with confidence. Stay safe, wrench smart, and enjoy the ride!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.