Mini UPS for my Wifi-Router
Hello everyone, so I was thinking of making a UPS since I have a problem of random power outages in my city since the last few months and so I at least for now want to secure the internet.
So I surfed the internet, and there were quite a few methodologies as to how to implement it. I didn't like the other ones, this one in theory looks fine to me, so I wanted to run a double check by you engineers to see if there will be any other hardware constraints which have not been considered here.
The basic pipeline is: you use the wifi adapter as input to the buck converter, which converts 12V to 8.4V to charge the batteries (2s and 3s configurations). The connections go to the bms module, then the output of those batteries is stepped up by using a boost/buckboost converter to give 12Vdc which goes to the router. There are schotkey diodes to prevent reverse current. What things should I be looking for to make it a simple useful project? And will there be any other hardware constraints?
The picture is one of the schematics for a general idea