Hear Hear. Just because it's in all capital letters doesn't make it so. And they forgot the operative word "may", as in "by mid 2019 MAY be mass producing a new type of battery". Like many such predictions, it doesn't actually happen.

One issue often glossed over in discussions of fast-charging batteries is the power needed to do that. E.g., suppose you have a battery that holds 20 KWH and you want to charge it in 30 seconds (1/120 of an hour). You'd need 20 * 120 = 2400 KW of power, i.e., 2.4 megawatts. Go ask your electrical utility for a price quote on that sort of connection...

But yeah, for launching gliders you don't need fast charging.