I don't see any mention of the FireFly Oasis battery technology.
Supposedly they have been able to significasntly reduce the amount of lead need to build flooded lead acid batteries by laying the lead on to a foam "backer" of sorts. The promotional photos show equivalent AH cells with the FireFly being about 1/3 the size of the wet cell. They are now supplying batteries to various Electrolux products.
As I understand it this company was spun off from Caterpillar when they were searching for more durable batteries for their industrial machines.