USB Camera for Raspberry Pi 4 B, as well as external power supply for the Pi only

Hello, I am currently working on a project that will take in pictures through a camera. I am using the Raspberry Pi 4 model B. I currently have the Pi Camera that uses a ribbon cable connection, but I would like to use a USB camera instead, such as Arducam, as I believe it would be more stable than with a ribbon cable connection. I was told that any usb camera that works with Linux-based OS (which is basically Raspbian) would work in my use case. But, does anyone have experience using a USB camera with Raspberry Pi 4 B? If so, which model camera did you use? It doesn't have to be Arducam, I just said Arducam because that's the only one I know exists that works through USB. Alternatively, if anyone has used Arducam and has had a positive experience with it (USB connection only) - I would also appreciate that. Raspberry Pi 4 B can also connect to Bluetooth, but I do not think there are any cameras that work with the Pi through bluetooth (although if anyone has ever done such a thing, I would be very interested 😀) The second thing I wanted to know was suitable power banks/portable power supplies that I could use to power my Raspberry Pi 4 B. There are thousands of power banks online, but I don't know which one would suit the power requirements of the Raspberry Pi 4 B. If anyone has experience or has used a power bank to power their Pi 4 B, it would be greatly appreciated. Thank you in advance for all the help!

Any usb camera would do fine. Bluetooth camera can work but you need to be able to get the software working, if software doesn't work on linux it is not possible to use that specific model. A powerbank with same specs about original charger should be fine

whats instable about the ribbon connector?

also any usb camera would work fine but they most likely would'nt be as good as the ribbon, I mean probably half the frames you get with the pi cam

the connector itself is unstable

alright thank you for the advice!

that shouldnt be the case, ive never had issues with mine so maybe you need to clean it or something

take it out and clean it with isopropyl alcohol

Please keep one question per topic, higher chanse for you to get a reply

oh yes I forgot about the power bank myself tbh

to answer that now, I haven't actually seen a power bank capable of supplying 5v 3a, I know some that's close enough you can get away with it if you don't have too many usb devices or anything

no i am talking about mounting it somewhere

the cable itself is flimsy

oh ok

wait why you dangling it from the cable? it has screw holes for a reason