7200mah Lithium Battery Powered; Can Be Use As Powerbank; 8 Inches Fan Blade.in Diameter Super-quiet Fan With 3 Speeds Angle Adjustable Portable Desktop/stand Fan. Rechargeable Battery Power Source 90 240v Battery 3.7v 7200mah Sealed Lead Acid Battery Charge Time 4.5hours Duration Time High - 7 Hours Medium - 12 Hours Low - 15 Hours Charging Voltage Dc 5v/2a