Devices　that　convert　ambient　energy　into　electricity　and　simultaneously　store　it　for　future　usage　are　highly　desirable.　Herein,　we　have　designed　a　hygroelectric　power　generator　with　energy　self-storage　ability　(HPGES)　by　hybridizing　a　moist-electric　energy　harvester　with　a　supercapacitor,　thus　achieving　the　conversion　of　chemical　energy　into　electricity　and　the　storage　of　electric　energy　at　the　same　time.　An　array　of　ten　HPGES　devices　are　able　to　deliver　a　voltage　output　of　2　V　and　adequately　drive　a　commercial　calculator.