The most suitable vehicle application for these batteries is in hybrid types where the vehicle range is not limited by the battery energy storage
. However, for a truly practical hybrid plug-in' design the batteries should be cheap, long life no maintenance, and have capacity to provide driving distances on a single charge of between 50 and 100 miles. Then, much if not most of our driving would be making use of energy sources other than petroleum, such as nuclear, hydroelectric, solar, etc.