This USB C cable lets the Bear Sentry energizer “trigger” 12V power delivery (PD) from a power bank capable of Type-C 12V PD, like the one available under More Good Kit.
Add a DC extension cable and you could power the fence from inside your tent where battery capacity may be less affected by cold weather.
USB C to DC 5.5mm x 2.1mm male barrel plug, 3A max output, 40cm length, 12g