Toyota and Panasonic annoucnes "future possible alliance" over EV batteriesToyota, Panasonic strike battery deal in threat to Tesla
Toyota and Panasonic said Wednesday that they are launching a "feasibility study" to investigate the technological potential of batteries that use prismatic cells, which are grouped together in pouches to power electric cars.
Note. personally not sure about the Threat part ..
As I wrote in the other thread, Japanese original article says a little bit different things. Basically they announce to consider alliance for batteries. Also Panasonic admitted cylindrical is the best format for EVs at least for now.