Celestron Celestron Rechargeable Power Supply PowerTank 17, 12v 17Ah, Black (18777) 17 amp-hour power supply for your Celestron telescope 2 x 12V DC output car jack socket Built-in: (2) USB ports for charing portable devices, AM/FM Radio and Siren, and circuit breaker for safety Removable red filtered flashlight with magnetic back Energy efficient LED spotlight Cigarette lighter adapter included Switchable 110v-220v AC adapter