GM working on mixed-chemistry battery packs for electric vehicles.

https://www.greencarreports.com/news/1145303_gm-working-on-mixed-chemistry-ev-battery-packs

"following handful of other automakers/ battery firms... patent filed... combines nickel manganese cobalt (higher power/ energy density) with lithium iron phosphate (cheaper) or other similar chemistries (faster charging), split into discreet modules, with different usable capacities... controller monitors temperature/ state of charge, potentially bypassing a chemistry, balancing performance/ cost... other companiesw: CATL faster charging plug-in hybrids, Our Next Energy 600 mile range in BMW iX... also: Mercedes-Benz"