P.S. I needed (or just by having it around, some additional safety related) special USB3.1 cable with built-in E-mark chip, as shown, for this (above USB2.0) setup, but almost everything posted here should be seen as partially irrelevant for here presented output of my own above 5.0V charging voltage focus (as long as I’m not getting some interfering/disturbing electromagnetic frequencies/ripples). And, this is not my permanent nor recommended charging setup (although running it non-stop with my very first Librem 5 phone for several days now).
@irvinewade, as I was very lucky and as I mentioned in my original post here, below PDUSB-C15W power supply (SB-AC16-TCUS) is still the one of my very favorite power supplies for charging of the Librem 5 (therefore I’d never ever sell it away):
EDIT: Google actually bought TC G1000 from Phihong (for their Pixel smartphones) and when I get more time I might make some review of this power supply charging Librem 5 (if any interest available). This is indeed one of the best and most reliable PD power supplies for charging of the Librem 5 (up to my own expectations/approach ).
As published two days ago, quite useful disassembly (only pure DCP protocol output registered, please refer to the related picture for reference) of brand new Lenovo联想10W充电器MC-108.
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