FIREFLY FEL6115 7 INCH RECH FAN WITH NIGHTLIGHT ABS Plastic 3.7V 1800 mAh Lithium Ion with overcharge and over discharge protection, safety battery features: PTC, PRV, CID, 6pcs led Duration Fan: low - 4H, mid - 3H, high - 2H / Lamp: low - 100H, high - 24H