that plug reminds me of the dodge "epic" electric van. Or it is some sort of in-between of a chademo or something. Very interesting. what a cool mower.
Reason the battery is worth its weight in gold is because of the Lithium Ion Phosphate Batterie. If it’s powered by Lithium Ion only stay away from it.
To be truly efficient, you would need automotive type battery chargers for each mower. That's an upfront cost that you don't have on a gas model. Just like an electric car that needs a $3k charger installation. Still, I really appreciate the umbilical cord setup. Very good idea.
I believe the idea behind any battery product on the market is a simple formula for cost being... lack of maintenance, times longevity, equals overall value. ie...How much would an equally capable gasser cost you after a 5 year ownership period?