Hybrid vehicles could potentially pave the way for conveyances that truly eliminate the world's need for the internal combustion engine, cut air pollution significantly and create a world once thought possible only in science fiction. The first of these vehicles, however, have certain disadvantages to their hybrid electrical systems that must be carefully maintained to ensure the vehicle runs as it is designed to.
Metal Hybrid Batteries
Some hybrid vehicles, like the Toyota Prius, utilize metal hydride batteries. These batteries operate at an extremely high voltage (necessary to run the vehicle) and pose a significant risk of motorist fatality should they be exposed to the battery during an accident. The life of the battery that runs the electrical system--while designed to last for the life of vehicle--only lasts between 150,000 to 200,000 miles and bares a high cost of replacement. The battery is also quite heavy which contributes to a lower degree of handling in terms of how the vehicle performs at higher speeds.
Electricity and the Cold
Electrical charges retain poorly at low temperatures. A hybrid vehicles electrical system has been shown to malfunction due to these constraints sometimes consuming the batterys charge or shutting the system down altogether, forcing the motorist to utilize the vehicles gasoline components exclusively. In those situations, the hybrids fuel economy is greatly compromised. No electricity for inner-city driving means a sincere lack of savings on fuel, which is one of the main reasons for having a hybrid.
Maintenance and Repair
Used parts for replacement and repair of the electrical system can seldom be found for hybrid vehicles that are new to the market. Licensed professionals must be used to conduct any repairs (no father and son tinkering underneath the hood) as they are dealing with components that carry a significant electrical charge and pose great risk to the mechanic if they are mishandled.
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