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Soldered-on RTC batteries (with type covered as a bonus)
(i.imgur.com)
This battery lasts the life of the router under the operating environmental conditions specified for the router, and is not field-replaceable.
But who determines its lifespan?
Knowing there is a battery set to fail and I can't simply replace it makes me physically uncomfortable. Enough so that I'd rather it not have RTC.
Thanks Cisco.
Not even soldered, but spot-welded. Still 'not field replaceable' sounds like a challenge to me. I be with some wirecutters, some solder, and a little bit of wire that battery can be easily replaced.
I've found the little flush cutters that came with my Ender3s are awesome for removing stuff that's been spot-welded like this. I took apart a few cordless tool packs with them, and kept everything so neat I could easily reuse all the tabs if I wanted.