On Tuesday, August 6, 2019 at 4:22:16 AM UTC+3, wrote:
Steve brings up a good point on the replacement cost of batteries, but one thing that needs to be considered is the rapid advance in battery technology.

FES has used same Kokam cell for 10 years. Lange has used same SAFT cells for 20 years. There has been absolutely zero advance in electric glider battery technology. Just a reminder.