Though the production version final design (or name) is still unknown, the automaker is definitely keeping the FT-HS as a hybrid. However, Toyota says it is still too early as to what type of hybrid it will be (i.e., full, plug-in, etc.). The Japanese car maker intends to make use of future lithium-ion batteries and plug-in hybrid technology when manufacturing can make them as dependable and solid as today's gasoline engines.