My console with WiFiLogger work on home made DC UPS 5V.
You can use some power banks, but not all will work as DC UPS. Some has no bypass option and you can't charge and discharge them in one time.
Please go to ebay, google etc. and search for "Angle DC 3.5*1.35mm USB" this cable has little bigger head than original one, but its fit, maybe it's slightly tight, but works fine.
Usb has same parameters like original console adapter. 5v 0.5A. You can use phone charger as well with USB, your PC when it's working with console.
This cable is a key to use power bank/ DC UPS.
For WiFiLogger users there is also second option to use soldering iron, remove fuse which is connecting power from console and solder external power supply max 9v (fuse limitation), or 12-14v without fuse, to supply wifi chip.
I couldn't not do anything more.