There's nothing irrationale about that. One disadvantage of the battery technology is that "half-filling" a battery doesn't half its weight. A Tesla-sized batte

There's nothing irrationale about that. One disadvantage of the battery technology is that "half-filling" a battery doesn't half its weight. A Tesla-sized battery pack for 100 km daily trip wastes lot of energy (several hunders of kilograms of dead weight, even regenerative brakes cannot recovery all the kinetic energy.)