UPS choice for networking gear?

I'm looking for something specifically for C9300s and N7706s. We're planning a deployment and need UPS backups for the power. I'm thinking that N backup is sufficient, because this would only be used in case of an outage, and as long as the device remains online and forwarding traffic, that's all that we expect the UPS to do.

However, the question remains about what type of UPS to use. (https://www.eetimes.com/document.asp?doc_id=1272971) There are a plethora of different designs, and generally speaking, lower interaction with the battery means reduced costs and higher response times in case of a failure, while higher interaction with the batteries means higher cost plus faster wear for the batteries, which also increases costs. A friend of mine that owns an IT shop buys exclusively online UPSes, because he's had issues with servers rebooting due to the short switchover time from line to battery power. But that's for HP servers, not networking equipment.

I can find no guidance on Cisco's website about what they recommend, except for old equipment like 4500 and 6500 switches.

For those of you that use UPS backups for your networking gear, what type and brand do you use, and what's your experience with it during power outages? Also, how much time do you normally budget for an outage before the UPS runs out of juice?

I'm trying to avoid simply calling a UPS vendor, because I don't like asking vendors for advice. They often don't know basic questions or they up-sell either to CYA or to boost commissions.