Operating selection and top rated speed are limited by battery technology.[46] Fuel cells and petroleum-electric hybrids also are underneath enhancement to increase the vary and make improvements to efficiency of the electrical generate technique.Ng??i qu?n tr? CNTT c?a b?n s? có th? thu th?p d? li?u này. ?i?u kho?n v? quy?n riêng t?. C?m ?n ph?