> Real Telco gear runs from -48VDC fed from, literally, tons of lead-acid > batteries.
I remember from ages ago some comment about telcos using iron rather than lead. Google finds Edison batteries, nickel-iron. Long life being their primary feature. https://en.wikipedia.org/wiki/Nickel%E2%80%93iron_battery 12V, 100AH, $1,093 https://ironedison.com/nickel-iron-ni-fe-battery That's their smallest size. I think they require maintenance -- fill them up occasionally. What's the lifetime of a modern lead-acid battery that a telco would use? -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
