NOVELTY - A flexible and laminated thin film single chamber microbial fuel cell comprises outer body (1) for supporting fuel cell having hollow space (2) and sealed space (3); sealing space unit (4); flexible thin foil metal electrode (5) for free communication to fuel solution present in hollow space and which connected at least two external positive point (8) (cathode) and negative point (7) (anode) by flexible metal stripe connector (6); fuel solution inlet system having fuel solution inlet (11)/fuel solution outlet (12), system of solid patch (10) and slightly extended rubber tube (9).    USE - As flexible and laminated thin film single chamber microbial fuel cell (claimed) used in light emitting diode, calculator (claimed).    ADVANTAGE - The flexible microbial fuel cell has an efficiency in terms of power density value of above 200 mW/m2, where as four microbial fuel cell connected in series its efficiency of power density value is above 3200 mW/m2. The flexible types of microbial fuel cell convert chemical energy of bio-convertible substrate directly into electrical energy in presence of yeast as micro-organisms as catalyst to convert substrate into free electrons. In the cell, in electrolyte, reductant and oxidant are freely communicated with each other. The fuel cell is easy for transportation, has flexibility and light weight. The raw material used for manufacturing is non-expensive. The flexible and thin film single chambered microbial fuel cell provides cheap and cost effective electrical energy, as alternative source of energy. The flexible and thin film single chambered microbial fuel cell has very highly efficient properties. The cell has simple design, easy to handle and economically as well as commercially manufacture; can operate widely in different temperature condition in outer space; and has long life other than existing fuel cell.    DETAILED DESCRIPTION - A flexible and laminated thin film single chamber microbial fuel cell comprises outer body (1) for supporting fuel cell having hollow space (2) and sealed space (3); sealing space unit (4) for separating hollow space and sealed space (3); flexible thin foil metal electrode (5) for free communication to fuel solution present in hollow single chamber space and which connected at least two external positive point (8) (cathode) and negative point (7) (anode) by flexible metal stripe connector (6); fuel solution inlet system having fuel solution inlet (11) and fuel solution outlet (12) which hold by system of solid patch (10) and has slightly extended rubber tube (9) for providing fuel solution in microbial fuel cell. The slurry of fuel solution comprises, trace nutrient medium as potassium chloride (KCl) and sodium chloride (NaCl), carbon source, energy source as glucose, phosphate buffer system and distilled water as vehicle. The microorganism selected for fuel solution is yeast.    DESCRIPTION OF DRAWING(S) - The figure shows a cross section view of the flexible and thin film, single chambered microbial fuel cell.    Outer body (1)    Hollow space (2)    Sealed space (3)    Sealing space unit (4)    Flexible thin foil metal electrode (5)    Flexible metal stripe connector (6)    Anode (7)    Cathode (8)    Extended rubber tube (9)    Solid patch (10)    Fuel solution inlet (11)    Fuel solution outlet (12)