In message
<CALTjT6rWQBBS=3rropp-eb2uukugomvvmrpddujeuavnapx...@mail.gmail.com>,
dated Fri, 29 May 2015, Scott Douglas <[email protected]> writes:
Examples for energy input other than from the mains power source:
· power over Ethernet
· power over a telephone land-line
· DC-powered products, and power over USB
· non-rechargeable batteries.
That seems illogical and therefore unreliable. The first four have in
common that their immediate power sources are 'one step away' from the
mains, i.e. there is a power conversion unit between 120/60 or 230/50
and the power actually delivered to the product. So why are rechargeable
batteries apparently excluded? It can't be that the list of examples is
simply non-exhaustive, because in that case why doesn't the list just
include 'batteries', whether rechargeable or not?
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
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