This electronics is integrated in the battery and warranted.
Half the weight and twice the life equals four times cost
It is however way less than half the weight; more like a quarter for the same Ah but that gives double the crank amps.
I do not need the full Ah but do need the cold crank amps and then the weight is 15%!!!! only.
So in my case a sixth of the weight, twice the logivity for triple the price.
Most likely the weight reduction will over the life of the battery save more than the extra cost in fuel consumption reduction.