What Do ATV Battery Numbers Mean?

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When shopping for a new ATV battery, you’ll see various numbers and letters on the battery labels. These might look confusing at first, but it’s worth taking some time to learn what they mean.

These codes contain a lot of important information about the battery, such as its power, size, and other specifications. By understanding these codes, you can make a more informed choice when buying a new battery.

The Battery Reference Code or Model Name

All batteries have a reference code that will tell you a lot of helpful information about the battery as long as you know how to read it. 

battery reference code

Different types of batteries structure the reference code differently. This post covers conventional lead-acid batteries, high-performance conventional batteries, and AGM batteries. 

To learn more about ATV battery types, visit this post

To provide the most accurate information, we base this post on what Yuasa, one of the major Powersports and ATV battery producers, tells us about the designation of battery type numbers. 

We use the same example codes as used by Yuasa in their battery application guide

AGM Battery Example Code: YTX14 A H L–BS–1

YTX14 A H L–BS–1: Indicates the battery series

The letters at the beginning of the battery reference code tell you what series the battery belongs to.

Battery manufacturers produce various battery types, each offering unique features for that series of batteries. 

As an example, we can look at the various series of high-performance Powersports AGM batteries offered by Yuasa: 

YTZ Series

  • Low range Ah capacity
  • Compact size and lightweight
  • High CCA / power density
  • Ideal for sportbike applications

YIX Series

  • Medium range Ah capacity
  • Improved CCA
  • Low-temperature performance
  • For universal use

GYZ Series

  • High range Ah capacity
  • Highest CCA
  • Heavy-duty application
  • Designed for the USA market

YTX Series

  • Full-range AC capacity
  • Improved CCA
  • For universal use

Each battery series has a range of battery models featuring different dimensions and Ah capacities to match all the various ATV models. 

Several online sources state you can identify the battery manufacturer from the first letter of the battery reference code, but that is incorrect. While it is true that Yuasa offers a YTX series of batteries, so do Mighty Max and probably others.

Any manufacturer is free to name their series of batteries as they want. Hence, the letters alone cannot identify which manufacturer made the battery. 

YTX14 A H L–BS–1: Battery Performance Classification

This number indicates the power output of the battery. You may find batteries with different performance classifications within each series of batteries. 

A higher number means higher power output. The battery of my Polaris Sportsman has a performance classification number of 20. 

YTX14 A H L–BS–1: Designates Unique Battery Case Size

Not all manufacturers or batteries have this letter in their battery reference code. Those that do use it to designate a unique battery case size. 

YTX14 A H L–BS–1: Increased Power (CCA)

Batteries with the letter H in the code let you know it’s a higher CCA battery. According to Yuasa, their H-series of batteries offer up to 30% more cranking amps. 

YTX14 A H L–BS–1: Polarity Location

Yet again, not all batteries have this letter in their battery reference code. But when it’s there, it tells you the polarity location. L = Left, R = Right.

YTX14 A H L–BS–1: Factory Activated of Bottle Supplied

A battery typically leaves the factory either as “factory activated” or “bottle supplied.”

FA: Factory Activated

A factory-activated battery is filled with electrolyte, sealed, and charged at the factory. It is ready to be put straight into use without any further action required by the buyer. 

The remaining service life of a battery starts decreasing as soon as it is activated. Therefore you should put a FA battery in use within a specified period; it cannot be stored for too long.

BS: Bottle Supplied

Bottle-supplied batteries leave the factory as a kit with one dry battery and the electrolyte in a separate plastic container. 

The buyer needs to put the electrolyte fluid inside the battery to activate the battery according to the supplied instructions. The battery then needs to be charged. 

Dry AGM batteries have a shelf life of 5 years as long as it remains properly sealed. When the seal is broken, a dry battery must be filled with electrolyte and charged. Otherwise, the internal plates will begin to oxidize. This gradually reduces the battery’s capacity until it reaches a point where it can no longer take or hold a charge.

If you have a battery that won’t charge or you can’t get to hold a charge, you will find a complete troubleshooting guide over at this post.  

Note that many sources online will tell you BS stands for Battery Sealed, but that is inaccurate. Yuasa batteries have provided the above definitions

YTX14 A H L–BS–1: Designates a Unique Terminal Style

If the battery reference code ends with a number, it tells you the battery has a unique terminal style. ATV and Powersports batteries come in 14 different terminal styles. Getting the right style that hooks up correctly with your bike’s connectors is essential. 

Conventional Battery Example Code: 12 N 12A–4 A–1

12 N 12A–4 A–1: Nominal Voltage

The nominal voltage tells you if you have a 6V, 12V, or 24V battery. It does not reflect the exact battery voltage, which may vary slightly. A healthy 12V battery is typically 12.6V or higher under no load.

12 N 12A–4 A–1: Conventional Battery

The N tells you it’s a conventional lead-acid battery.

12 N 12A–4 A–1: Size of the Battery Case

12 N 12A–4 A–1: Polarity Location

12 N 12A–4 A–1: Exhaust/Vent Location

12 N 12A–4 A–1: Terminal Style

High-Performance Battery Example Code: YB16A L–A2

YB16A L–A2: High-performance Conventional Battery

The letters YB tells you it’s a high-performance conventional battery.

YB16A L–A2: Battery Case Size

YB16A L–A2: Polarity Location

YB16A L–A2: Terminal and Exhaust/Vent Location

Amp-Hour Rating Ah

The Battery Ah rating of a battery is typically labeled in a format like this: 18.9 Ah (20HR)

ah hr rating

Ah is a unit where 1 Ah equals the charge transferred by a current of one ampere flowing for one hour.

A battery with an Ah rating of 18.9Ah (20HR), as the one in the image, can provide 18.9 Amps when discharged in 20 hours. It can provide 18.9A/20H = 0.945 Amps continuously for 20 hours. 

As you increase the Amp-draw from a battery, draining it faster, the battery Amp-Hour capacity will decrease. An 18.9Ah battery, as in the above example, can only provide about 18A when discharged over 10 hours. And if you draw 18.9 amps from an 18.9Ah battery, it would not last 1 hour.

That’s why they add an “H” rating of typically 10H or 20H. It bumps up the battery’s Ah rating to a higher value. 

Cold-Cranking Amps (CCA)

cca rating

The CCA (Cold Cranking Amps) rating is a number that indicates the number of Amps (Amps = strength of an electric current) that a 12V battery can deliver at –18°C (0°F) for 30 seconds while maintaining a voltage of at least 7.2 volts.

A battery with a higher CCA rating has more power to start the engine in cold weather.

Simply put, if you live in a cold area or plan to use your ATV during winter, look for a battery with a higher CCA rating because it’ll be more efficient at starting your engine in the cold.

Voltage Rating

All batteries have a label that indicates the nominal voltage. Most ATVs are 12V. If you put a 6V battery in a 12V ATV, it will not start. 


sae pp

SAE is short for the Society of Automotive Engineers. It tells you that the American standard was used to estimate the battery’s CCA rating. The American and European norm differs slightly.  

[PP]>PP< tells you the battery casing was made with a polypropylene-polyethylene copolymer.

Charging Method

Some but not all batteries are marked with the proper charging currents.

atv battery charging method

Most chargers have settings that allow you to switch between lower charging currents for cold or standard charging or higher currents for a faster charging cycle. 

Never charge a battery at a higher rate than these ratings, as it may overcharge and damage the battery. Head to this post to learn how to charge any ATV battery properly.

Recycle Rymbol in Conjunction With the Letters “Pb”

recycle lead acid battery pb meaning

Pb is the two-letter identifier for lead in the Periodic Table of Elements. This tells you how to recycle the battery after use properly.

Related Questions

What do the numbers on an ATV battery mean?

The numbers on an ATV battery represent its physical size, voltage, amp-hour capacity, and cold-cranking amps.

What does the voltage number on an ATV battery indicate?

The voltage number on an ATV battery, typically 12V, indicates the electrical potential difference the battery can provide.

Why is the amp-hour (Ah) number important on an ATV battery?

The amp-hour number on an ATV battery signifies its capacity. Higher Ah values mean the battery can power your ATV for longer.

How many amps should an ATV battery have?

ATV batteries are typically 10 Ah to 20 Ah. Larger engine displacements (cc) usually require a battery with more amps than smaller engines.

Wrapping Up

Deciphering the codes on your ATV battery can tell you everything about its capacity, performance, and manufacturer specifications, from the battery series and performance classification to the size of the battery case and even its unique terminal style.

Understanding these codes helps you make an informed choice when buying a new battery and ensures you can properly maintain and handle it during its lifespan.

Haavard Krislok
Haavard Krislok
Haavard Krislok is an ATV and off-road enthusiast with a rich background spanning two decades in owning, maintaining, repairing, and utilizing ATVs for farming, logging, and hunting. Outside his professional life as an engineer and project manager, he cherishes recreational trail riding and is the creative force behind BoostATV.com, serving as its owner, editor, and content creator.

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