This mobile auxiliary battery can be charged with a 12V module as well as a solar module with USB output, as well as a USB or 12V plug-in power supply. The outputs are just as universal. There are 2 USB outputs available. The voltage at the DC socket can be adjusted manually and allows direct connection of notebooks or laptops in a voltage range between 12 and 24VDC. The illuminated display informs about the charging state, power and output voltage.