YTX9-BS LIFEPO4 - 12 Volt 8 AH, 300 CCA, Lithium Iron Phosphate (LiFePO4) Battery

$79.99

YTX9-BS Lithium Battery Replacement for ATK All KickStart Model 91-95

Name: YTX9-BS Lithium Battery Replacement for ATK All KickStart Model 91-95
SKU: YTX9-BSLIFEPO413
Availability: InStock

Availability: In stock

SKU: YTX9-BSLIFEPO413 Category: LiFePO4

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
Terminal	Nut and Bolt
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

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Tracie G

Arrived as scheduled. Installed and works exactly as described. Would recommend.

Glenn Cummings

My order was delivered faster then expected, the battery is during the job that I purchased it for, I am happy with my purchase.

Charlie and Gretchen

Fit good looks good it’s new so I have no idea of long term survival yet . Generac xg8000e.

Alanna W

Works great in my chicken coup for the timed winter light—A+!!!

brian cardona

Had a power outage during the freeze that occurred in Texas in January 2026, and my UPS switched over to it's battery with no issues. However after the power came back I noticed the battery was refusing to charge. I looked online for a replacement and came across Mighty Max Battery and looked at other reviews for the specific model I was looking for and saw nothing but great things. I ordered my item and it shipped very fast and was able to swap out my old OEM battery for the Mighty Max replacement and it's proving to be as good if not better than the OEM model I had. I'm expecting it to last a very long time. Thanks Mighty Max Battery!

Tony ROBINSON

Great battery for the price

Stephanie Steelman

Just received a new 12v 18mA Mighty Max from Amazon for my Champion genset. Perfect replacement for the same battery purchased in 2019 (lasted 6+ years) which replaced the Original battery which lasted just 2 years.