NOVELTY - A lithium ion bi-cell (9) comprises a central anode (4A,4B) and two counter cathodes, electrolyte, three terminals including an anode terminal and two cathode terminals, comparator designed to operate with anode and one of cathodes based on load requirements, and a control system designed to operate with one of anode and cathode based on SoC levels of cells (17,18). Each cathode is placed on either side of the anode such that one cathode is of layered oxides and other cathode is made of manganese spinel oxide or orthorhombic iron phosphate.    USE - Lithium ion bi-cell is used for plug-in electric vehicle and hybrid electric vehicle (claimed).    ADVANTAGE - The lithium ion bi-cell has favorable electrochemical property.    DETAILED DESCRIPTION - A lithium ion bi-cell (9) used for plug-in and hybrid applications with charging method to cater to varying load requirements of plug-in electric vehicle and hybrid electric vehicle has a central electrode including anode pasted on both sides of anode current collector (5) and two counter electrodes (2,7) including cathodes placed on either side of central anode (4A,4B), respectively, with separators (3,6) filled with inorganic electrolyte which are sandwiched between counter cathode (2) and central anode (4A), and counter cathode (7), central anode (4B). The cathode current collectors (1,8) are placed at outermost surfaces of cathodes (2,7). The lithium ion bi-cell comprises a central anode and two counter cathodes of dissimilar composition, an electrolyte placed between each anode and cathode, three terminals including an anode terminal and two cathode terminals, a comparator designed to operate with anode and one of cathodes based on load requirements such that at any point of the two terminals including anode and cathode are connected to system, which implements discharging, and a control system as a controller designed to operate with one of anode and cathode based on SoC levels of cells (17,18) such that at any point of the two terminals including anode and cathode are connected to the system, which implements charging. Each cathode is placed on either side of the anode such that one cathode is of layered oxides and other cathode is made of manganese spinel oxide or orthorhombic iron phosphate. Primary cathode is made of layered oxides caters to all low and average load requirements. Secondary cathode is made of manganese spinel oxides or orthorhombic iron phosphates to bear only peak loads. An INDEPENDENT CLAIM is included for method for charging lithium ion bi-cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the lithium ion bi-cell.    Cathode current collectors (1,8)    Counter electrodes (2,7)    Separators (3,6)    Anode (4A,4B)    Anode current collector (5)    Lithium ion bi-cell (9)    SoC levels of cell (17,18)