I didn’t say anything about who I bank with or that I use banks that uses these practises. Calm down

Tell banks that still use it as MFA that

Along with your comment it looks like you are powering a phone with a power bank by skipping the phones battery and connecting directly to the phones battery terminal?

5V may be too high of a voltage for your phone as the phones lithium battery would have otherwise provided 4.2v ish but youll need to find out.

If you directly connect to the charge controller input does it still work or does it complain that there’s no battery?