How to switch between DC input and DC output? Follow
The 5.5 x 2.1mm barrel port on Omnicharge is in DC input mode by default. To use the DC output function, you have to manually set it up in the menu.
Please note that once you unplug a cable from the barrel port, Omnicharge can sense the detachment and switches the barrel port back to DC input mode automatically, which means you have to set it in the menu again to use DC output. It is a safety design so you don't need to worry about confusing two different modes and harm your devices.