More than 2 years ago when I was investigating the possibility of buying a leaf I had heard of these guys and even then they were saying by late 2019 they would have their modular tesla sounding battery out.
IMO they don't have anything that remotely resembles a finished product.
Furthermore I doubt that 6 months from now anything will change.
They have never released videos showing off progress under the guise of "some one might steal our idea".
I call BS on that.
Muxsan shows off everything on YouTube videos. A few people have tried to imitate muxsans tech for their own personal entertainment but no one has tried to steal his idea and his stuff is very diy compared to building a modular liquid cooled replacement pack.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO