NOVELTY - A nanophotoelectrochemical battery comprises nanophotoelectrode and cathode respectively inserted into electrolyte and connected with load through lead. The nanophotoelectrode comprises zinc oxide nanorod array deposited on one side of conductive substrate. The cathode is platinum sheet electrode or P-type semiconductor electrode. The concentration of electrolyte solution is 0.1-5 M. The zinc oxide nanorod has a shape of hexagonal prism which is a single crystal structure having diameter of 10-1000 nm and length of 100 nm to 50 mu m and is grown vertical to the substrate.    USE - Nanophotoelectrochemical battery used for solar hydrogen production.    ADVANTAGE - Raw materials are easy to obtain. Manufacturing method is simple and easy to control, has low cost, and does not require high-temperature annealing.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of nanophotoelectrochemical battery by:    (A) ultrasonically cleaning conductive substrate (preferably fluorine tin oxide glass, indium tin oxide glass, or conductive polymer) with acetone, anhydrous ethanol and deionized water for 5-30 minutes; dipping in zinc salt alcohol solution (0.001-0.1 M) to cover upper surface of substrate with zinc salt alcohol solution; washing with anhydrous ethanol for 10 seconds; drying with argon; repeating dipping, washing and drying steps 2-6 times; and heating conductive substrate at 200-400 degrees C for 10 minutes;    (B) suspending conductive substrate and inversely placing to deposit solution after dipping, washing and drying steps of heated conductive substrate are repeated; standing at 50-95 degrees C for 1-30 hours; and washing with deionized water and air-drying to obtain zinc oxide nanorod array photoelectrochemical battery, in which the deposition solution is a mixture of zinc salt aqueous solution (0.001-0.1 M) and amino salt aqueous solution (0.001-0.1 M); and    (C) using battery obtained in step (B) as working electrode; selecting platinum sheet electrode or P-type semiconductor electrode as cathodes; inserting the two electrodes into electrolyte solution comprising potassium chloride or sodium sulfate aqueous solution; and performing packaging and lead connection processes.