> I assume that datacenters UPSes are better [...]
I don't know about specific datacenter models, but in our colocation there are humans available 24/7. So the UPS might not start after failure, but there's a human to figure it out.
Most (all?) decent datacenters also have generators on site, and the intent is that the UPS will never run out of charge. So the fully-discharged case is an error and it might be intentional to require intervention to recover.
Most (all?) decent datacenters also have generators on site, and the intent is that the UPS will never run out of charge. So the fully-discharged case is an error and it might be intentional to require intervention to recover.