
Product Specifications for USA-Made Big Crank™ ETX20L Battery
BM Part #: | ETX-20L |
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Made In: | U.S.A. |
Battery Polarity: |
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Voltage: | 12 Volt |
Capacity: | 17.5 Ah |
Type: | AGM |
Length: | 6.88" |
Width: | 3.44" |
Height: | 6.00" |
Cold Cranking Amps: | 310 CCA |
Shipping Weight: | 17.00Lbs |
Warranty: | 1 Year Pro-rated |
- Made in the USA. Why it matters:
- Superior craftmanship; rigorously tested; high-quality parts.
- Great OEM replacement with an easy installation design.
- This 12V AGM motorcycle battery ships fully charged and ready to install!
- Maximum performance and efficiency.
- Superior starting power, high reserve capacity, and long lasting life.
- Maintenance-free advanced AGM technology.
- Vibration Resistant Leakproof, and Spillproof.
- Environmentally friendly, 100% recyclable.
- New bolts included in every package.
- Also, includes brass spacers necessary for side mount cable installation.
Product Description

You've just discovered a best seller.
Want to know a secret?
The Big Crank ETX20L battery offers the most advanced power and value in the industry, and is ideal for ATVs/UTVs, motorcycles, personal watercraft, and snowmobiles.
Our competitors are so jealous of our American made Big Cranks that they list "Replacement for Big Crank" and try to substitute an inferior grade imported substitute. Be wary of cheap knockoffs, ONLY batterymart.com carries the wildly popular BIG CRANK ETX20L.
The Big Crank ETX20L Battery has become extremely popular because of the value it provides. With its spillproof and leakproof design, this is not a 12V AGM motorcycle battery that will need to be replaced frequently, or require high-level maintenance. The Big Crank Battery's terminals are versatile, with increased strength and durability. Our customers also love the ease of installing this battery. But don't take our word for it! Check out over 1,000 customer reviews! Many of our customers tell us this battery has lasted them better than half a decade, which is why we're not afraid to guarantee your satisfaction, 100%. Battery Mart will refund the purchase price of your battery if it fails to meet your expectations in any way.
So what makes this battery so popular? Features:


- Sealed, Maintenance-Free
- Leakproof/Spillproof
- Ships fully charged and ready to install
- Environmentally friendly, 100% recyclable
- Vibration Resistant Design
- Made in the USA
- New bolts included
These batteries are made in the USA. Just think; if every American spent at least $64 on something made in America, we could create 200,000 jobs right now!
Dealers sell the ETX20L for $148.99 and more. We buy the ETX20L 12V AGM motorcycle battery direct from the manufacturer, and pass the savings directly to our customers- no middleman!
Order today and receive free standard shipping on your USA-Made Big Crank Battery.
Tech Tip: Easy Front Mount Installations
This battery is supplied with unique terminal hardware (2 spacers and 2 bolts for cable to terminal connection). This hardware is required for proper installation on certain applications. Other hardware may damage terminals and should not be used. The spacers are required for front mount cable installation only! The top mount position does not require the round spacers, use supplied bolts only. Torque bolts to 6 to 8 ft. lbs. How A Front Mount Looks when Installed: |
Cross Reference
Customer Reviews
This is my second Big Crank battery for my fatboy.
First one lasted just over three years, same as the harley battery.
This one saves about $80 compared to harley.
I've been ordering from Battery Mart for many years for various bikes. Very happy with selection, shipping and pricing.
This will be my second Big Crank battery, the first one lasted about 7 years, didn't have a second thought about getting another. Battery Mart was great, had what I needed and shipped it super fast with great packing, I definitely recommend this battery and this store!
My 7 year old original battery on my 2015 Yamaha Grizzly 700 was getting close to its end, so I purchased this replacement battery. Please Note: This is my second purchase from Battery Mart as I purchased this exact battery in 2009 for my former 2007 Yamaha Grizzly 700. When I sold my old 2007 Yamaha Grizzly, I kept the Big Crank battery for a spare for my newer ATV which is still good to this date - September 2022.
I would highly recommend Battery Mart and their products. Items are very well packaged and are delivered very quick.
I was going through batteries every other year. But this battery lasted 8 to 10 years.
Best deal in batteries! Made in the USA! Second batteries for my 2012 FXDWG. First one lasted just a month shy of 5 years! Expect the same from this new replacement. Excellent starting power. Have Big Crank in two of my other bikes as well!
Bought the Big Crank for my Roadmaster. Fit perfect and spins the motor over faster. I’ve had this battery in my Harley road king with great result’s also.