Acoucou YTX9 BS YTX9A-BS Motorcycle Battery, YTX9-BS12V 4.25Ah Sodium-Ion Battery, 250CCA, For Motorcycles, ATV, Lawn Mowers, Tractors
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Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 10 left in stock, order soon!
Arrives
Monday, Mar 30
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Features
- High-Performance Sodium-Ion: New sodium-ion tech, our Powersports Battery YTX9 delivers 200 amps for motorcycle starts, 3000+ cycles for longevity. Compared to lead-acid battery,it's 2X more power,10X more starts,and 5X longer life
- Dimensions and Lightweight:: (L) 5.91 inch x (W) 3.37 inch x (H) 4.13 inch, Item Weight: 2.62 Lbs. YTX9BS battery Replaces battery sizes: YTX9A-BS, ETX9A-BS, LTX9A-BS, NTX9A-BS, FTX9A-BS, ENTX9A-BS, GTX9A-BS, MTX9A-BS, CTX9A-BA, M32X9A, MF12V7-2A, MFA127AH, PTX9A-BS, UTX9A, YTZ10S, CTZ10S, CTZ10S-BS, EBZ10-BS, EBZ10A-4, EBZ10A-4-1, FAITZ10S, FAYTZ10S, GTZ10S, LTZ10-4, M7210
- Safe and Fast Charging: YTX9-BS motorcycle battery Charges from 20% to 80% in 15 minutes with built-in smart protection, auto-switching to constant voltage mode for secure, efficient charging and extended lifespan
- Wide Compatibility: This YTX9 bs battery Compatible with most brands and models, motorcycles, ATVs, UTVs, PWCs, quads, 4 wheelers, jet skis, waverunners, scooters, riding lawn mowers, tractor, dirt bike, generators and more. Fit for Honda Honda ATV TRX300EX TRX400EX 300EX 400EX battery Kawasaki Suzuki Yamaha Harley Davidson Seadoo Polaris etc
- Extreme Temperature: Our YTX9 battery Reliably operates from -40F to 176F, delivering stable power in freezing winters or scorching summers, while its maintenance-free design guarantees hassle-free performance
- When charging, please select a professional sodium-ion charger, the voltage should not exceed 15.00V. Standard charging voltage is 14.8V0.2V. Do not exceed 3C currentcharging for the battery.
- We've updated our packaging with a cleaner label for a better unboxing experience. All product specifications remain the same. Furthermore, we have improved the method for installing the fixing screws, making the process easier and saving you time.
Brand: Acoucou
Battery Cell Composition: Lithium Ion
Automotive Fit Type: Vehicle Specific Fit
Manufacturer: Acoucou
Manufacturer: Acoucou
Brand: Acoucou
Model: Acoucou 12V 4.25Ah Lithium Battery
Item Weight: 2.4 pounds
Package Dimensions: 6.22 x 4.65 x 3.62 inches
Item model number: YTX9A-BS
Batteries: 1 12V batteries required. (included)
Manufacturer Part Number: 12-4.25
Date First Available: July 1, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Mar 30
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Very Light weight, arrived with 14+ volt charge. Was just a bit too large for my battery tray. Had to return. Wanted to keep it though.
Reviewed in the United States on November 23, 2025 by Tokie
This battery lives up to its claims. It put out enough power to crank my 1260cc motorcycle easily. I wouldn't hesitate to replace a normal lead acid battery with a battery like this for most applications. This style of battery can convert from top posts to side posts, but they usually come with a special rectangular nut that will keep the nut from spinning as you tighten the screws. This battery comes with regular hex nuts, which is incredibly lazy. You can use the included hardware but you'll have to hold the nut in just the right spot with your baby finger while screwing in the other side of the bolt. Annoying, but once you get it connected the battery works well.
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Reviewed in the United States on September 30, 2025 by J. Kelley
Works great in my Cub cadet mower. Just had to add a zip tie to keep it from moving around because it's so small. Cranks strong and charges back up quick to over 14 volts on my mower. Time will tell how well it lasts. Only down side is the terminals were a bit of a pain but wasn't too bad. I reused my old bolts instead of the smaller ones that came with the battery.
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Reviewed in the United States on October 26, 2025 by peter peter
I recently replaced the stock battery on my motorcycle with the Acoucou YTX9-BS 12V 4.25Ah sodium-ion battery, and the difference is clear. Installation was straightforward and it fit perfectly in place of my old lead-acid battery. The first thing I noticed is the weight—this battery is noticeably lighter than lead-acid, which makes a surprising difference in handling and overall ride feel. At the same time, I have much more peace of mind compared to lithium batteries. With sodium-ion, there’s no risk of thermal runaway or overheating, which means I don’t have to worry about safety issues even in hot weather or long rides. Another big plus is the environmental benefit. Sodium-ion technology is cleaner and safer for the environment than lead-acid, so I feel good knowing I’m using a greener option without sacrificing performance. So far, it has delivered consistent starting power and reliability. For anyone considering an upgrade, this battery strikes the perfect balance of lightweight design, safety, and eco-friendliness. Highly recommended!
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Reviewed in the United States on September 12, 2025 by Shao Shao
I'm impressed. Fired my riding lawnmower right up and the price was very fair. I hope the new technology performs well.
Reviewed in the United States on November 12, 2025 by Warren Reed
So far this is working great for my motorcycle. It never failed to start with my old battery, but sometimes it would crank slow for a second but still start, but when it would do that the clock on the instrument cluster would reset. So far that has not happened so this new battery seems to have fixed that. It is crazy lightweight, it is 2 pounds 10 oz or 1193 grams, compared to 6 pounds 14 oz for my SLA that it replaced. I have knocked a star off for one simple reason: on most batteries the terminals have a slot that holds a square or rectangle nut that ideally fits snuggly so it can't fall out and won't require a wrench to hold it while tightening the terminal screw. This battery came with a standard hex nut that had tons of room to move around. Once that battery was in place there was no room for a wrench to hold it and just getting the nut maneuvered into place while you put the screw through the battery terminals was a huge pain in the rear end. They could have and should have done better, it's almost like the engineer of this battery had never looked at how it's done on a traditional battery.
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Reviewed in the United States on August 31, 2025 by JeffK651 JeffK651
The media could not be loaded. See my Amazon video but I'm ultra impressed with this first offering with sodium ion tech still advancing. For those that couldn't find a way to make a SMALLER battery fit into a bigger battery bay, I've addressed that in my video. You DO NOT need a special charger for these. Your standard OHV charging system and older non-smart vehicle's 12V charging system will charge it just fine. Acoucou just needs to release a 300-350 CCA Powersports battery in the same footprint. There's plenty of space to stuff more cells into the existing battery enclosure.
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Reviewed in the United States on November 6, 2025 by Massive Overkill
This battery is so new of technology you can't hardly find a charger that works and it also needs something extra to your vehicle for it to recharge it by itself so I had to take it back it is ultra light and pretty cool but I just don't have the right charger or extra money to add anything to my bike.
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Reviewed in the United States on September 28, 2025 by Niyiasrepus