YTX20L-BS - 12 Volt 18 AH, 270 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery
YTX20L-BS - 12 Volt 18 AH, 270 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery
YTX20L-BS - 12 Volt 18 AH, 270 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery
YTX20L-BS - 12 Volt 18 AH, 270 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery
YTX20L-BS - 12 Volt 18 AH, 270 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery
Rated 4.93 out of 5 based on 15 customer ratings
(15 customer reviews)

$54.99

YTX20L-BS Battery for Yamaha Big Bear Grizzly Kodiak YFM400 400, 450

Availability: In stock

SKU: YTX20L-BS256 Category:
This YTX20L-BS is a sealed lead-acid (SLA) absorbed glass mat (AGM) rechargeable battery. AGM and GEL batteries are lead-acid and of the same battery chemistry. This battery comes already charged, sealed, maintenance free, and ready to install.
Premium quality absorbed glass mat technology (AGM) is ideal for  ATVs, Motorcycles, Personal Watercraft, Jet Ski’s, Snowmobiles and more.
Specifications of the YTX20L-BS Battery
Voltage: 12 Volt
Amperage: 18 AH
Chemistry: SLA, AGM
Terminal: Nut & Bolt 
Battery Dimensions: 
6.88 in x 3.50 in x 6.13 in
Weight: 11.79 Lbs
Warranty
1 Year
Amp Hour

18Ah
CCA

270
Chemistry

SLA / AGM
Height

6.13
Length

6.88
Volts

12V
Polarity

– I +
Weight

11.79 Lbs
Warranty

1 Year
Width

3.50

15 reviews for YTX20L-BS Battery for Yamaha Big Bear Grizzly Kodiak YFM400 400, 450

  1. Rated 5 out of 5

    Matt –

    Works great

  2. Rated 5 out of 5

    gary pangione –

    good item good price

  3. Rated 5 out of 5

    robert –

    Old Battery/ new Battery same Size Easy install ????

  4. Rated 5 out of 5

    boaz22 –

    Great product. Easy to install. Fit perfectly. Longetivity TBD. SO FAR TO SO GOOD.

  5. Rated 5 out of 5

    Jessica cortez –

    Easy to install and a great price.

  6. Rated 4 out of 5

    Mrs. Young –

    Works fine just make sure your running it regularly to keep the charge

  7. Rated 5 out of 5

    RLM –

    YTX20L-BS – Very good battery for a good price. Mighty Max was very responsive to a shipping problem that was no fault of their own. Happy with their product and service.

  8. Rated 5 out of 5

    Stretchey –

    Installed in the Yamaha Big Bear starts up right away when COLD

  9. Rated 5 out of 5

    Calvin Aaron –

    Came charged and ready to go

  10. Rated 5 out of 5

    Calvin Aaron –

    Came charged and ready to go

  11. Rated 5 out of 5

    Chris haynes –

    Great battery for big bear 400

  12. Rated 5 out of 5

    Chris haynes –

    Great battery for big bear 400

  13. Rated 5 out of 5

    Web Customer –

    Works great hopefully last a long time

  14. Rated 5 out of 5

    Customer –

    Works great hopefully last a long time

  15. Rated 5 out of 5

    marcia meyer –

    Great fit and so far it is starting my Yamaha with no problem.

Only logged in customers who have purchased this product may leave a review.

Excellent
Mighty Max Battery
Based on 4585 reviews
See all reviews
Donna Sherian
I purchased the Mighty Max ML7-12 12V 7.2Ah battery on Amazon in June 2026 to replace the battery in my APC Back-UPS ES 550, and it worked perfectly. The battery was very reasonably priced, arrived quickly, and was incredibly easy to install.

The fit was exact, the connections were straightforward, and my UPS was back up and running in just a few minutes. Now my modem and Wi-Fi system stay powered during outages and power flickers, which has eliminated the need to constantly reset my network equipment.

If you’re looking for an affordable, reliable replacement battery for a UPS, alarm system, or other backup power application, I highly recommend the Mighty Max ML7-12. Great value, easy installation, and excellent performance so far!
kevin jenkins
POWER PROVIDER!! Love It.
Dave Peleshok
Great battery. Working perfectly in my garage door openers.
Alison Russo
Batteries were easy to install. I've used this product before - no issues
Adam Atlas
Nice products, used many and enjoyed all. Really high quality batteries and chargers,!!! 👍
Mike Gibson
The Mighty Max battery is a great product and outstanding value, outperforming batteries costing triple the price.
Thomas Owens
Received on time
Jeff Allen
Ordered as a replacement battery for a 2016 Honda PCX150. Received with a charges which was a nice plus. Battery was fully operational when received and installed. Only issue is in the terminal attachments in that the “keeper” nut would not stay stationary within the battery terminal hubs when trying to screw the terminal to the cable(s). Had to shim and/or tape them in place in order to start the bolts and complete the attachment to the battery terminals. Otherwise appears to be a good replacement battery. Would purchase another when the time comes,
Joe Rios
Shipped timely, looknforward to installing it.
Helen Allen
Battery was received from UPS in a beat up box with a lot of dirt and ink stains on the outside of the box. The inner box with the battery was unharmed. This was an Amazon ship and the packaging was not up to their standard.

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