The Pi zero doesn't support 5GHz WiFi, so it simply doesn't see the 5GHz networks and doesn't care about their names. The reason your Pi doesn't connect is likely elsewhere.
I would start by setting the country code via Localisation Options item from the menu, and configure the connection using raspi-config.
Also try connecting your phone to the router, and ...
I think the answer is in software, not hardware. I am running a pi zero W with a standard infra-red camera, and have got rid of the pinkish tone with a line in /boot/config.txt:
This answer I found on a github thread, supplied by a raspberry pi engineer, so I trust it.
The Pi has 3 "components" the CPU, GPIO and Video Core which are relatively independent. Even when the Pi is shutdown the Video Core continues to run, and the GPIO pins retain their state; only the CPU is not running.
According to the Foundation the Pi Zero draws 55mA on shutdown; the ZeroW would be expected to draw more, as would any connected ...
Typically you would measure the value yourself at 1m and use that value in a beacon transmission. Using the RSSI graph on nRF Connect can be a good starting place.
Although using the TX power alone is a challenging way to get an accurate location. There are plenty of research articles and blogs about the challenge. Searching "Bluetooth Real Time ...
Some USB power supplies are not great in maintaining 5v with peaky current requirements, even when they are quoted at 2.5 Amps. And poor power cabling will cause additional voltage drops along the way. With my Raspberry Pi battery power supply I did an experiment where I used one unit driving a Pi4 + LCD, USB Hub with Keyboard, Mouse and Webcam to also power ...
Your question is unclear wrt how the batteries are connected. However, battery connections aside, what you're doing is probably not a good idea. If you'd like to edit your question to include a schematic, perhaps we can answer more definitively.
However, your comment changes your question substantially:
One reason I want to chain them is to connect their ...
The Pi Zero has a basic power configuration i.e. NONE!
All the 5V pins are interconnected; there is absolutely no protection.
You could power one from another, but this seems pointless, and just involves running more current through the board traces.
Just run BOTH from the same 5V supply; it doesn't matter whether you use the dedicated USB port or the 5V ...
That will work provided
the power supplied to the first Pi is sufficient for its needs and the needs of the second Pi.
that any polyfuse fitted to the first Pi will let sufficient current flow for both Pis.
I don't think the Pi Zeros have polyfuses so any failure is down to case 1.