Electric vehiclesJapanese group has yet to ramp up output of new high-capacity modelPanasonic Energy's 4680 battery, right, is twice as large as its earlier 2170 model and has roughly five times the capacity. (Photo by Yo Inoue)SAYA KANAUCHIMay 12, 2026 05:46 JSTOSAKA -- A Panasonic Holdings unit has postponed mass production of a new electric vehicle battery once again while it waits for a major customer to place its order.