NOVELTY - The vehicle (12) has an electrical motor/generator (16) for recovering kinetic energy from the vehicle to recharge a high-voltage energy storage bank when operated as a generator and for thawing electrical current from the energy storage bank to propel the vehicle through a drive train by a combustion engine (14) when operated as a motor. A direct current (DC)-to-DC converter recharges the high-voltage energy storage bank from a low-voltage battery bank. An alternating current (AC)-to-DC converter recharges the low-voltage battery bank from an AC source.    USE - Plug-in hybrid electrical vehicle. Can also be used for an electrical vehicle (claimed).    ADVANTAGE - The vehicle comprises a blended energy storage system that utilizes larger number of relatively less expensive low-voltage lead-acid storage batteries as a low-voltage battery pack and relatively less number of sophisticated high-voltage batteries and/or super capacitors as a high-voltage energy storage pack, thus reducing cost of the system. The high-voltage energy storage pack is used to enable vehicle acceleration and capture deceleration energy when the lead-acid storage batteries are cycled rarely. The vehicle allows a customer to select a number and type of low-voltage batteries appropriately for a particular vehicle being purchased. The number of low-voltage batteries, DC-to-DC converter and AC-to-DC converter can be efficiently arranged in a module that can be mounted on the vehicle in a suitable location. The lower-voltage batteries are easy to operate, and the combination of low-voltage energy storage batteries with DC-to-DC converter electronics and high-voltage energy storage can prolong service life of the low-voltage storage batteries. The vehicle reduces a number of charging and discharging cycles of the low-voltage batteries from hundreds of cycles per day.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for storing energy and delivering energy from an energy storage system in a hybrid electrical vehicle    (2) an electrical vehicle comprising an electrical motor/generator.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a propulsion system of a hybrid electrical vehicle.    Hybrid electrical vehicle (12)    Combustion engine (14)    Electrical motor/generator (16)    Drive wheel (26)    Energy storage system (28)