Hi elorimer, and thank you for your reply. It would need to be connected to a laptop by Lan (laptop battery does not worry me, because if the power is off and I’m working I realise and I can react before it turn off, but I cannot do so with the router) and some IoT devices through wifi, maybe a raspberry in a future (with a low data transfer), I don’t pretend to have power for everything during 9 hours (normally outages are shorter), maybe a couple when using the laptop and some longer if the blank is during night. I already thought about the data transfer, but I don’t need more than 100 MB normally, and if it becomes necessary on a regular day, I can always unplug and connect to 5ghz in the main router (during a blackout, all the data transfer that may fit in the 4G net, about 10MB?)