The news came today as GM has announced it will use lithium manganese-rich (LMR) battery cells in its largest electric vehicles, the full-size trucks and SUVs sold by Chevrolet, GMC, and Cadillac. They are to be produced by Ultium Cells, its joint-venture battery company with LG Energy Solutions. The first such cells will come from a pilot line in 2027, with full volume production in 2028 at a plant it hasn’t disclosed. Lower Cost, Higher Energy DensityA full-size prototype GM LMR battery cell. The trade-off for lower cost is lower energy density by volume.