UPS recommendation for TP-Link TL-SG105E switch,need at least 6 hours backup

I’m looking for a UPS/power backup solution for my TP-Link TL-SG105E 5-Port Gigabit Easy Smart Switch. I need the switch to stay powered during power cuts for at least 6 hours, preferably longer if possible. The switch uses a small DC adapter, so I’m wondering whether a mini DC UPS/router UPS helps it Edit : I’m running a Raspberry Pi server, and both my router and Raspberry Pi already have UPS backup. The only device that doesn’t have a UPS is this network switch. I’m also a student, so I can’t really afford a large or expensive power backup solution. I’m looking for something affordable that can keep just this switch running for at least 6 hours during a power cut.