Power banks can be incredible depending on your needs. 1) I have a 100w capable one that can charge my laptop. 2) Same one can also power my soldering iron (though is overkill for it) 3) a BIG power bank I have with an AC outlet on it can power my desktop weed vape during a power outage
Network switch, two VM hosts, a raspberry Pi, wireless AP, Zigbee coordinator, and two NASes. 17 minutes, enough time to go "oh shit the power went out time to start turning everything off"