Whilst I am OK with software, hardware especially electronics is not my field.
I have a Raspberry Pi. It is enclosed in a water-proof case apart from an aperture that lets out a USB-C cable. Inside this case are my RPi and a USB power pack powering this RPi. When the RPi runs the camera captures motion for as long as there is power in the USB bank. When run down I attach the USB-C cable to a wall charger and the USB power bank is recharged.
At any point do I need a UPS system?
It will vary when the power bank runs out (depending on work by the RPi) so as I understand it the UPS battery could also run out as well with no chance to recharge the USB charger in time.
Is my understanding correct or do I need to do more research?