YTX9-BS LIFEPO4 - 12 Volt 8 AH, 300 CCA, Lithium Iron Phosphate (LiFePO4) Battery
YTX9-BS LIFEPO4 - 12 Volt 8 AH, 300 CCA, Lithium Iron Phosphate (LiFePO4) Battery
YTX9-BS LIFEPO4 - 12 Volt 8 AH, 300 CCA, Lithium Iron Phosphate (LiFePO4) Battery
YTX9-BS LIFEPO4 - 12 Volt 8 AH, 300 CCA, Lithium Iron Phosphate (LiFePO4) Battery
YTX9-BS LIFEPO4 - 12 Volt 8 AH, 300 CCA, Lithium Iron Phosphate (LiFePO4) Battery
Rated 4.86 out of 5 based on 7 customer ratings
(7 customer reviews)

$79.99

YTX9-BS Lithium Replaces Honda TRX400EX FourTrax, Sportrax 99-13

Availability: In stock

SKU: YTX9-BSLIFEPO448A Category:

Mighty Max Lithium Iron Phosphate (LiFePO4) engine start batteries are designed to replace Flooded, AGM, and Gel cell lead acid batteries in Power Sport applications such as motorcycles, ATVs, personal water craft, lawn mowers, utility vehicles, scooters, and dirt bikes.

  • Up to 80% lighter than Lead Acid Equivalent
  • 5X the Life of a Lead Acid Battery
  • 2000+ Deep Cycles at 80% Depth of Discharge
  • Foam spacers included to fit multiple size battery boxes.
  • Lithium Batteries do not sulfate

Attention – make sure to only use a compatible lithium charger for this battery and tightly screw the terminals. Having loose terminals will cause a buildup of heat resulting in damage to the battery.

 

Specifications:

Voltage: 12.8 Volt

Cold Cranking Amps: 300

Cranking Amps: 400

Watt Hrs: 51.2

Terminal: Nut and Bolt

Sealed Lead Acid Equivalent Amps: 8Ah

Case Dimensions:

5.94 in x 3.44 in x 4.25 in

Weight: 1.00 pounds.

Volts

12.8
Watt Hrs

51.2
Chemistry

LiFePO4
CCA

300
Length

5.94
Width

3.44
Height

4.25
Weight

1.00 Lbs
Quantity

1
Warranty

1 Year
Terminal

Nut and Bolt

7 reviews for YTX9-BS Lithium Replaces Honda TRX400EX FourTrax, Sportrax 99-13

  1. Rated 5 out of 5

    Web Customer –

    Great battery- great price

  2. Rated 5 out of 5

    Customer –

    Great battery- great price

  3. Rated 4 out of 5

    john –

    Seems good. Charged up but I haven’t undertakes it yet because I’m not sure if it’s safe to with this crack. I’m guessing it should be alright since there’s no liquid.

  4. Rated 5 out of 5

    Web Customer –

    This battery has 210 cold cranking amps,and the stock one only has 120. This one weighs 1.5 lbs, and my stock battery weighs 6.5 lbs. They are the same physical size, but the mighty max weighs 5 lbs less, and is way more powerful. Win Win!

  5. Rated 5 out of 5

    Customer –

    This battery has 210 cold cranking amps,and the stock one only has 120. This one weighs 1.5 lbs, and my stock battery weighs 6.5 lbs. They are the same physical size, but the mighty max weighs 5 lbs less, and is way more powerful. Win Win!

  6. Rated 5 out of 5

    Savman –

    Weighs almost nothing, super low discharge rate, great price. Fits the size of a stock battery so you dont have to have foam fillers to keep it from bouncing around. It also has a built in meter so you can see the charge level.

  7. Rated 5 out of 5

    U-234 –

    Perfect fit in my 1995 TRX300EX Honda. I like the fact that I didn’t need to use pads around the battery case. It is lighter than a 210 CCA Shorai that I bought 6 years ago for my Suzuki DRZ400S. The battery posts on the Mighty Max seem to be a little stouter than the ones on the Shorai. I am happy with the battery. I haven’t had it long. No problems.

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

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Mighty Max Battery
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John & Cathy
Arrived quickly. Even got a sticker with it.
Sean Chacon
Solid looking battery, came well packaged. Have used their battery before for my lawnmower and now looking forward to see how it lasts in my snowmobile.
larry scervino
I can't believe it less than 48hrs since I ordered from Walmart and it's in the machine. What more can I say except great price.
Thanks Larry
Paul Major
Item as described and perfect fit and arrived on time
Manny Jaramillo
Battery arrived in a good shape package strait to my door steps
Robin Lauer
Arrived just in time to power my generator here in the cold Maine winters. Excellent service!
Shutter Dog Homestead
Arrived quickly from WALMART.COM. Perfect size and proper placement in my generator. Installation was easy. Generator fired right up. Battery came fully charged.
Larry Geiger
New battery. Ready for cold weather!
Harmon Chandler
So far these Might Max batteries are good but it’s only the first day and they were on charge for 12 hrs. I’ll have to come back and do an update at some point in time. Ordered them on Amazon and got them the next day. I was encouraged by Mighty Max to make this google review and post pictures to extend my warranty for 3 months but there is no way to post pictures 🤣🤣🤣 It’s been a few months and I was able to go back and edit, so here is a video I made, the rest of the photos I have deleted. Batteries are still going strong. Update 12-11-2025
Carl Ruckinger
They arrived within 2 days of ordering them packaging was really good I haven't put them in my MX350 yet I hit them with my multi meter fresh out of the box and got 12.4v on both batteries so that is good

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