I found a new lower price on 12v Lithium batteries (LiFePo4).

The new price is $279, with a $20 discount coupon. Price includes free shipping from a California warehouse and a 5 year Warranty.

I have linked the battery below (be sure to click the $20 discount box).

I could not find a tear down video of this battery, however, it has some good Amazon reviews and I found a review video for the 300ah battery (link to the video below). I also found a review/recommendation for the 300ah version for Dump trailers (link below).

Remember, whenever you are buying a lower priced Lithium battery, be sure you are comfortable with the purchase before you spend your money.

Please let us know if you decide to purchase this battery and let us know what you think about it.

Links:

Amazon Link -- LFPMax Lithium (LiFePo4) 12v 100ah battery

Mechanicspick.com/best-battery-for-hydraulic-dump-trailer/

LFPMax Lithium battery Review