Celestron PowerTank 17, 12v 17Ah

Large capacity – 17000 Mah provides several hours of power to your Celestron telescope.  Charge other devices – The PowerTank 17 also features two 12v and two 5V output ports which allow you to charge multiple devices.  Torch – The built-in torch with a tilting head allows you to navigate with ease under the dark night sky.  Radio – The PowerTank also comes with a built-in siren and AM/FM radio for emergencies.