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After quite a few power failures last year, I finally decided in getting a UPS for my network rack cabinet.
This one seemed good enough for my usage and with my current devices (Ubiquiti UniFi UDM Pro + UniFi 24 port PoE Switch + Synology NAS + a few devices powered via PoE) I get about 25 minutes of battery, which is good enough to carry on working for a bit or just safely shutting down the ones I don't actually need and increase that time.
From what I saw, the batteries are supposed to last 2y, so I will try to come back to update this review when it starts to complain and asking to replace them.