A battery swap? Changing 1000kg worth of battery on a float plane... that's going to be a fun exercise!
Someone above mentioned "range" and "endurance"... I saw
a claim in a story that they were expecting 30 mins flight + 30 mins reserve.
Originally Posted by https://www.bloomberg.com/news/articles/2019-03-26/canada-seaplane-operator-harbour-air-plans-electric-engine-flight
Batteries remain the limiting factor for electrical propulsion in aviation, said Roei Ganzarski, MagniX’s CEO and a former Boeing executive. The Magni500 electric motor to be used in the Harbour Air flight testing is rated for 750 horsepower and offers a 60-minute range, more than twice as long as Harbour’s average flight, Ganzarski said, allowing for a 30-minute reserve on the batteries.
Kudos to them for giving it a go... hopefully it will help advance battery technology.