Without battery.Battery operated phone charger only use alkaline batteries If the switch is pressed on the left, it is used for USB charging, while the switch on the right is used to activate the LED light This compact and portable emergency USB power bank charges mobile devices with 4 AA batteries The AA battery-powered cell phone charger works with smartphones, tablets and a variety of other electronic devices Socket supports USB Type A only Power supply: 4 x AA batteries (not supplied) Output voltage: 5-6Vdc Output current: 1000mA Dimensions: 88 x 68 x 18mm Weight: 40g