Toyota is ditching the NiMH battery tech found in its popular hybrids for the more efficient lithium-ion chemistryNew lithium-ion batteries will boost efficiency and cut costs. Since the original Prius, most Toyota hybrids have NiMH batteries. Moving forward, other Toyota hybrids will too. Toyota’s New EV BatteriesSpecifics about the new batteries Toyota is developing are limited at this early stage. We know that in addition to developing its own new lithium-ion cells, Toyota is also working with battery specialists, including CATL.