2000 Polaris Sportsman 500 Battery Size

There’s nothing quite like the feeling of your trusty 2000 Polaris Sportsman 500 refusing to start when you’re miles from the garage. That sinking feeling, the silence where a throaty rumble should be—it’s a moment every rider dreads. More often than not, the culprit is a weak or dead battery, but finding the right replacement isn’t always as simple as grabbing the first one off the shelf.

You’ve got a classic workhorse of an ATV, but its electrical heart needs the right power source to keep it reliable on the trail and on the job. Getting the wrong size can lead to frustrating installation issues, poor performance, and even damage to your machine.

In this comprehensive guide, we’re going to eliminate the guesswork. We’ll promise to show you exactly what you need to know about the 2000 polaris sportsman 500 battery size, from identifying the correct part number to choosing the best battery type for your riding style. We’ll walk you through a step-by-step installation, cover common problems, and give you the pro tips to make your new battery last for years to come.

The Right Fit: Decoding the 2000 Polaris Sportsman 500 Battery Size

First things first, let’s get straight to the answer you’re looking for. Finding the correct battery is about more than just a name; it’s about a specific set of dimensions, power ratings, and terminal configurations. This section is your core 2000 polaris sportsman 500 battery size guide.

Standard OEM Battery Size and Specifications

The most common factory-replacement battery size for the 2000 Polaris Sportsman 500 is the YTX14AH-BS. Let’s quickly break down what that industry-standard code means:

YTX: This designates a high-performance, maintenance-free AGM (Absorbent Glass Mat) battery made by Yuasa, though many other brands use this prefix for compatible models.
14: This is a performance rating. It’s not a direct measurement of Amp Hours, but a general indicator of the battery’s power capacity.
AH: This indicates that it’s a high-performance version of a standard “14” series battery, often with more cranking power. “A” stands for Ampere.
BS: This means the battery is shipped “Bottle Supplied,” meaning it comes with the acid pack separate for you to fill and seal before the first use.

Beyond the part number, here are the key electrical specs you need to know:

Voltage: 12 Volts (Standard for all ATVs of this era).
Amp Hours (Ah): Typically around 12 Ah. This measures the battery’s storage capacity—how long it can provide power.
Cold Cranking Amps (CCA): Aim for a battery with at least 190 CCA. This is crucial; it measures the battery’s ability to start the engine in cold weather. For off-roaders who ride in all seasons, a higher CCA is always better.

Why Physical Dimensions and Terminal Layout Matter

Your Sportsman 500 has a specifically designed battery tray. Forcing a battery that’s too large can damage the tray or the battery casing, while a battery that’s too small can vibrate excessively, leading to internal damage and a short lifespan.

The standard physical dimensions for a YTX14AH-BS battery are approximately:

Length: 5.31 inches (134mm)
Width: 3.50 inches (89mm)
Height: 6.56 inches (166mm)

Always double-check the dimensions of the replacement battery before you buy. Also, pay attention to the terminal polarity. On this battery, the positive (+) terminal is on the left and the negative (-) terminal is on the right when you’re looking at it from the front. Getting this wrong means your cables won’t reach.

Beyond the Basics: Choosing the Best Battery Type for Your Ride

Knowing the size is half the battle. The other half is choosing the right technology. The type of battery you choose can significantly impact performance, reliability, and maintenance. Understanding the benefits of 2000 polaris sportsman 500 battery size upgrades is key to making a smart purchase.

Conventional Flooded Lead-Acid Batteries

These are the old-school, traditional batteries. They are the cheapest option upfront, but they come with drawbacks. They require regular maintenance, including checking and topping off electrolyte levels with distilled water. They are also prone to spilling acid if the ATV tips over, which is a real risk in off-roading.

AGM (Absorbent Glass Mat) Batteries – The Off-Roader’s Choice

This is the technology behind the OEM-spec YTX14AH-BS. In an AGM battery, the acid is absorbed into fine fiberglass mats packed between the lead plates. This makes them completely sealed and spill-proof.

The benefits are huge for an ATV:

Vibration Resistant: The packed construction makes them far more durable on rough trails.
Maintenance-Free: Once sealed, you never have to add water.
Spill-Proof: You can mount them at an angle, and they won’t leak, even in a rollover.
Longer Lifespan: They typically last longer than conventional batteries under the same conditions.

For most riders, an AGM battery offers the best balance of price, performance, and reliability.

Lithium (LiFePO4) Batteries – The Ultimate Upgrade?

Lithium-iron-phosphate batteries are the latest technology and offer some incredible advantages. They are an excellent option if you’re looking for a more sustainable 2000 polaris sportsman 500 battery size solution due to their long service life.

Pros include:

Extremely Lightweight: They can be up to 70% lighter than a lead-acid equivalent.
Massive Cranking Power: They deliver a stronger punch for faster, easier starts.
Very Long Service Life: They can last 2-4 times longer than a lead-acid battery.
Low Self-Discharge: They hold a charge for months, making them great for seasonal use.

However, they have two main cons: they are significantly more expensive, and they require a specific lithium-compatible battery charger or tender to avoid damage.

How to Replace Your 2000 Polaris Sportsman 500 Battery: A Step-by-Step Guide

Alright, you’ve got your new battery. Now it’s time to get your hands dirty. This simple guide will show you how to 2000 polaris sportsman 500 battery size replacement is done safely and correctly.

Safety First: Tools and Precautions

Before you start, gather your tools and get your safety gear on. Don’t skip this step!

Tools Needed: A socket set or wrenches (typically 10mm), a wire brush or terminal cleaning tool, and maybe a flathead screwdriver.
Safety Gear: Always wear safety glasses and gloves. Batteries contain corrosive acid and can produce explosive gases.
The Golden Rule: Disconnect the negative (-) terminal first, and connect it last. This prevents accidental short circuits if your wrench touches the frame.

Step 1: Locating and Accessing the Battery

On most 2000 Sportsman 500 models, the battery is located under the front storage rack. You’ll likely need to lift or remove the plastic rack cover to expose the battery compartment. It’s held in place by a rubber hold-down strap.

Step 2: Disconnecting the Old Battery

Remove the Negative Cable: Using your 10mm wrench, loosen the nut on the black, negative (-) terminal. Wiggle the cable off the post and tuck it away from the battery.
Remove the Positive Cable: Now, loosen the nut on the red, positive (+) terminal. Remove the cable and move it aside.
Remove the Battery: Unhook the rubber hold-down strap. Carefully lift the old battery straight out of the tray. Be aware, it’s heavier than it looks!

Step 3: Installing the New Battery

Clean the Area: Take a moment to clean the battery tray and the cable terminals with a wire brush. A clean connection is a good connection.
Place the New Battery: Gently lower your new, fully charged battery into the tray, making sure the terminals are oriented correctly (positive on the left).
Connect the Positive Cable: Attach the red, positive (+) cable to the positive terminal and tighten the nut securely. Do not overtighten.
Connect the Negative Cable: Now, attach the black, negative (-) cable to the negative terminal and tighten it.
Secure and Finish: Re-attach the rubber hold-down strap. Apply a thin layer of dielectric grease or terminal protector spray to the terminals to prevent future corrosion. Replace the rack cover, and you’re done!

Common Problems with 2000 Polaris Sportsman 500 Battery Size and Power

Sometimes, a new battery doesn’t solve everything. Here are a few common problems with 2000 polaris sportsman 500 battery size and electrical systems that you might encounter.

“My New Battery Doesn’t Fit!” – The Sizing Mismatch

This is a frustrating but common issue. It usually happens when an online retailer lists a “compatible” battery that has slightly different dimensions. This is why we stress measuring your old battery and the battery tray before you buy. If it doesn’t fit, don’t force it. Return it for the correct YTX14AH-BS size.

“It’s Still Not Starting!” – Beyond the Battery

If a new, fully charged battery doesn’t get your Sportsman running, the problem lies elsewhere. Check these things next:

Corroded or Loose Connections: Even a little corrosion can block the flow of electricity. Double-check that your cable ends are clean and tight at both the battery and their other ends (frame ground and starter solenoid).
Faulty Starter Solenoid: If you hear a “click” but the engine doesn’t turn over, your solenoid might be bad.
Bad Stator or Voltage Regulator: If your new battery dies after a few rides, your ATV’s charging system is likely the culprit. It’s not recharging the battery as you ride.

Battery Draining Too Quickly? The Hunt for a Parasitic Drain

A parasitic drain is something that draws power from the battery even when the key is off. This can be caused by a faulty accessory or a short in the wiring. A simple test with a multimeter can help you diagnose if you have a drain and begin to isolate the circuit causing it. If you’re not comfortable with electrical diagnostics, this is a good time to consult a professional mechanic.

The Ultimate 2000 Polaris Sportsman 500 Battery Size Care Guide

A good battery can last for years with proper care. Following this 2000 polaris sportsman 500 battery size care guide will maximize its lifespan and save you money in the long run.

Best Practices for Battery Longevity

These are the simple 2000 polaris sportsman 500 battery size best practices every owner should follow:

Keep It Charged: The single best thing you can do for a powersports battery is to keep it charged. Lead-acid batteries degrade quickly when left in a discharged state.
Use a Battery Tender: If you don’t ride your ATV at least once every couple of weeks, invest in a smart battery tender (or maintainer). It monitors the battery and keeps it at an optimal charge without overcharging it.
Keep It Clean: Periodically check the terminals for any signs of corrosion (a white or greenish powder). Clean it off with a wire brush and a solution of baking soda and water.

Storing Your Sportsman 500 for the Off-Season

When storing your ATV for more than a month, connect it to a quality battery tender. This is far better than simply disconnecting it or letting it sit. A tender will exercise the battery, preventing sulfation and ensuring it’s ready to go when you are.

Eco-Friendly Battery Disposal

Part of responsible ownership is proper disposal. An old lead-acid battery is hazardous waste. Never throw it in the trash. The best eco-friendly 2000 polaris sportsman 500 battery size practice is to return your old battery to the store where you bought the new one. Most retailers accept them for recycling and may even offer a small credit.

Frequently Asked Questions About the 2000 Polaris Sportsman 500 Battery

What is the stock battery size for a 2000 Polaris Sportsman 500?

The standard, most common replacement battery size is a YTX14AH-BS. This provides the correct physical dimensions, terminal layout, and power specifications for your machine.

Can I use a different size battery in my Sportsman 500?

It is strongly recommended to stick with the stock size. A smaller battery will likely have insufficient power and will vibrate too much in the tray. A larger battery simply will not fit in the designated compartment without modification, which is not advised.

How many Cold Cranking Amps (CCA) do I need?

You should look for a battery with at least 190 CCA. If you frequently ride in cold weather or have accessories like a winch or extra lights, opting for a battery with a higher CCA rating (210 or more) is a smart investment for reliable starting.

How do I know if my ATV battery is bad?

Signs of a failing battery include slow engine cranking, dimming headlights when you start the engine, a battery case that is swelling or bulging, and the inability to hold a charge for more than a few days. A simple voltage test can confirm its health; a fully charged 12V battery should read around 12.6V or higher.

Is an AGM or Lithium battery worth the extra cost?

For most riders, yes, an AGM battery is absolutely worth it over a conventional flooded battery. The maintenance-free, spill-proof, and vibration-resistant design is perfect for an off-road vehicle. A Lithium battery is a fantastic performance upgrade for serious riders who value weight savings and longevity, but its high cost and specific charging needs make it a premium choice.

Choosing the right battery for your 2000 Polaris Sportsman 500 is a crucial step in keeping your classic quad reliable and ready for adventure. By understanding the correct size (YTX14AH-BS), selecting the right technology for your needs, and practicing good maintenance, you ensure that when you hit the start button, your Sportsman roars to life every single time.

Now you have the expert knowledge to make a confident choice and tackle the job yourself. Get out there, stay safe on the trails, 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.