US Nickel Hydrogen battery maker EnerVenue said this week it will offer the industry’s longest extended warranty for stationary batteries – essentially 20 years and 20,000 cycles. Now that knocks the hell out of lithium ion warranties, usually 3,000 cycles and 10 to 12 years. EnerVenue also promises that its batteries will work at 88% capacity or better. Lithium ion batteries lose 1% to 2% every year in capacity. This will cover any project throughout its payback phase and is offered with no hidden exclusions and simple operating terms. This is nothing short of revolutionary and it will not be lost on anyone on the lookout for a new battery technology, especially when you add the fact that this battery…