This is a 5V, 22.4 Amp-hour battery pack. It comes with the cords to charge it and feed power to the DayStar Quark Eyepiece Solar Filter. The Quark uses 1.5 amps and 5 Volts, so this battery pack will run the Quark for more than a day. It has a 2 Amp output and a 1 Amp output. The Quark needs to be plugged into the 2A slot.