Funny you posted today, I just unboxed the GoldenMate unit and got it set up, finished reading the manual, etc. First impressions: it’s very, VERY basic. Makes the Anker units seem like absolute Cadillacs. You don’t get so much as a numeric readout for the battery charge level–just primitive bars–let alone a runtime estimate.
There’s also no external comms with the GoldenMate Unit–neither Bluetooth nor Wi-Fi nor anything else. There’s a USB port, labeled “diagnostic interface” in the user manual, with stern warnings that it is not consumer accessible and will not enable “communication with the unit.”
There’s also a faint but audible capacitor or coil whine when the unit is powered on. Not horrible, and a lot of people wouldn’t be able to hear it at all, but if you’re one of those folks with an excellent upper frequency hearing range… you’ll be able to hear it, in a reasonably quiet room, although the whine will disappear entirely if there’s a quiet conversation or kid noisily crunching his way through a bowl of pretzels nearby.
(Yes, that’s a very specific example. Well, I stopped being able to hear the whine from the GoldenMate unit ten feet or so behind my head, so… that very specific example is a very accurate example, too!)
I haven’t had a chance to properly put this thing through run-flat tests yet, but I suspect it will do essentially as-advertised on those. It weighs about 30% more than the Anker Solix C300 that was on the bench before it, and there are those positive Amazon reviews, so I suspect that part will be okay.
All things being all things, I prefer the Anker so far.