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ExpertPower

ExpertPower YTX9-BS 12V 9Ah ATV Battery ETX9-BS Replacement AGM, 180 CCA

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Availability: In Stock.
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Arrives Monday, Oct 19
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Size: YTX9-BS


Features

  • Specifications and Size: This 12V 9Ah generator battery delivers 180CCA and measures 5.91" L, 3.43" W, and 4.21" H. Terminal Type: N&B
  • Sealed Design: Our scooter battery maintenance-free, fully sealed construction prevents leaks and features a low self-discharge rate for longevity.
  • Performance & Fit: This 12 volt 4 wheeler battery features low internal resistance for reliable high-rate discharge performance.
  • Operating Temperatures: The unit operates in extreme environments with a certified working temperature range between -30C and 55C.
  • Compatibility and Setup: For use as a four wheeler battery, verify existing dimensions and terminals match before plug-and-ride installation. Compatible with TRX300X, EX (2001-2021), ATV Ranger, UTV Ranger 150, and more.

Description

Advanced AGM Tech | Leak-Proof AGM Design High Cranking Amps | Consistent Starts Ready for Adventure | Maintenance-Free Why a Car Charger is Dangerous: Standard automotive chargers often output 10A to 50A, which is far too aggressive for a 12V 9Ah battery. Overcharging causes internal heat buildup, warping the plates and permanently degrade the battery's capacity. Does this fit your ride? Verify your YTX9-BS requirements. The YTX9-BS (12V 9Ah) is one of the most versatile batteries in the industry, trusted for its high cranking power and compact footprint. To ensure a perfect fit, please verify your original battery dimensions (5.91'' x 3.43" x 4.21") and terminal polarity before ordering. Using the correct 9Ah capacity ensures your electronics remain stable and your ignition stays crisp. Compatible Models Include: About Us ExpertPower is a Los Angeles-based supplier of Energy Storage Systems located in the heart of beautiful southern California. Since its establishment in 1987, ExpertPower has worked hard to earn its reputation as the most dependable in the business. Our product reviews are from actual customers who both appreciate and trust the quality they have come to expect from our products. From our smallest battery pack to our largest energy storage system, ExpertPower designs, manufactures, distributes, services and supports energy storage solutions that provide customers with superior value. Our broad global network provides a wide variety of energy storage equipment, storage solutions and support services. Our mission at ExpertPower is to empower individuals and communities to live sustainable and fulfilling lives by providing innovative energy solutions that enable energy independence and a greener future.

Brand: ExpertPower


Vehicle Service Type: ATV, street-cruiser-motorcycles, street-motor-scooters, street-touring-motorcycles


Size: YTX9-BS


Voltage: 12 volts


Battery Cell Composition: Sealed Lead Acid


Item Weight: 6.5 pounds


Product Dimensions: 3.43"D x 5.91"W x 4.21"H


Number Of Cells: 6


Item Highlight: Motorcycle Battery with Nut & Bolt Terminals, OEM Fit Sealed Lead Acid Powersports Batteries for 4 Wheeler, UTV, Scooter See more


OEM Part Number: YTX9-BS


Compatible with Vehicle Type: ATV, street-cruiser-motorcycles, street-motor-scooters, street-touring-motorcycles


Voltage: 12 volts


Number Of Cells: 6


Automotive Fit Type: Vehicle Specific Fit


Size: YTX9-BS


Item Weight: 6.5 pounds


Item Dimensions D x W x H: 3.43"D x 5.91"W x 4.21"H


Battery Type: Sealed Lead Acid


Brand Name: ExpertPower


Manufacturer Part Number: YTX9-BS


Item Highlight: Motorcycle Battery with Nut & Bolt Terminals, OEM Fit Sealed Lead Acid Powersports Batteries for 4 Wheeler, UTV, Scooter


OEM Equivalent Part Number: YTX9-BS


Model Number: YTX9-BS


Manufacturer: ExpertPower


UPC: 814832021306


Global Trade Identification Number: 06


Number of Items: 1


Included Components: BLMMYB12_9


Item Type Name: YTX9-BS ETX9-BS AGM Maintenance Free Power Sport Battery


Manufacturer Warranty Description: 1yr


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Long Lasting Battery
Size: YTX9-BS
Great little batteries. I use these for my generator and get a few years or better with them. Small ones like these stored outdoors with hot & cold seasons usually don't last better than a year or two if you're lucky.
Reviewed in the United States on May 4, 2026 by Red
    • starts up every time
Size: YTX9-BS
I loved how cheap and good quality this battery is. I needed a atv battery everywhere else was 50-100 dollars for this small battery. This battery works great and starts up my quad with no issues every time good product
Reviewed in the United States on February 13, 2025 by Amanda Nuno
    • Fits Kawasaki 2019 Z-400 like a glove
Size: YTX9-BS
Fits Kawasaki 2019 Z-400 like a glove. I gave it five stats because I put the an Expert Power into my other Honda NC700x 3 year ago, not on a charing tender and still at 13v 3 years later. The bolts were long enough to grab nut and came with an extra. I used painters tape around the terminals and pulled off after I caught the thread. I put on a tender 2 days before installing. It was immediately at 75% and at 100% in 30 minutes. This was with a .5amp trickel charger. Recommend getting a SAE usb charger with volt meter to keep an eye on voltage . Also a good time to install a SAE cable if you don’t have one. Will update if battery fails or after more time. ... show more
Reviewed in the United States on June 7, 2026 by Stan
    • Good
Size: YTX9-BS
works good
Reviewed in the United States on July 18, 2026 by David L
    • Reliable Replacement Battery ExpertPower ETX9-BS Still Going Strong Since July 2025
Size: YTX9-BS
purchased the ExpertPower ETX9-BS 12V 9Ah Lead Acid Battery in July 2025 as a replacement for my YTX9-BS powered equipment and it has been performing perfectly ever since. This battery fits and functions exactly as a direct drop in replacement for YTX9-BS models commonly used in motorcycles scooters ATVs snowmobiles or similar small engines. Installation was straightforward no modifications needed the terminals match the size and orientation perfectly and it cranked strong right away. The 12V 9Ah sealed lead acid design is maintenance free spill proof and vibration resistant which is ideal for powersports use. What stands out is the longevity so far. I bought it over six months ago in mid 2025 and it is still holding charge reliably starting consistently even after sitting for a week or two between uses no noticeable drop in performance weak cranking or sulfation issues. It delivers solid cold cranking amps for reliable starts and the build quality feels sturdy with a durable case that handles bumps and temperature swings without problems. Compared to some other aftermarket YTX9-BS replacements I have tried in the past this ExpertPower version has proven more dependable over time. No early failures or capacity fade like cheaper options sometimes show. It is a great value especially if you want a trustworthy AGM style sealed battery without paying premium brand prices. ... show more
Reviewed in the United States on February 26, 2026 by Niche
    • Battery
Size: YTX9-BS
Fast shipping and work great fits perfect in my 06 Kawasaki z750 highly recommended thanks
Reviewed in the United States on July 23, 2026 by Amazon Customer
    • Poor product, poor customer service
Size: YTX9-BS
Would give 0 stars if I could. Battery died prior to use and will not take a charge. Company wants to charge me $13 to ship a replacement since I purchased it from Amazon and not directly from them. Not going to happen since it is a poor quality product to begin with. Poor product, poor customer service. ... show more
Reviewed in the United States on July 14, 2026 by Blake Dupuy
    • Great part and price
Size: YTX9-BS
Awesome battery!
Reviewed in the United States on July 24, 2026 by Debra Drayer

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