Likewise for boats. It's high time we stop using lead batteries in vehicles where weight matters, and the pricing on this looks great.
Do you know the weight and dimensions of this?
It looks like it is equivalent to 835 Ah @ 12V. That is 10 lead batteries. You probably can buy more than 3 lead batteries for 300 dollars, but the weight and 10 year warranty does look attractive.
I have 500 Ah in 4 AGM batteries that cost me $1200. If all that 835 is usable I'd have to spend $3600 to come close with the same AGM's I'm using now.