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I have a Z6 II that is supposed to be able to run off USB power that I got for making videos. I've tried using it with a 120v AC to USB adapter plug (the kind you plug a phone USB cable into a wall with) along with the supplied USB A-to-C cable, but the battery on the camera drains faster than the incoming power flow, so the camera depletes and shuts off. (Which defeats the whole point of upgrading from the original Z6).

Looking online, I think I need a "Power Delivery (PD) USB type C supply", but I'm not sure what specs to look for. I don't want to buy a bunch just to test and see if they work (or work better).

Is there a certain spec I should look for? Any amperage rating? Any kind of overcurrent protection?

What power supply do I need to run the Z6 II continuously via USB?

UPDATE: I've heard from some people (camera shop) that I should use a high-wattage rated charger like the kind used to power laptops over USB-C. I ordered one to try and will report back if it works better than the phone chargers.

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It is just pretty much as simple as that. Nikon specifies that the power supply must be directly USB-C not just adapted from USB-A but pretty much any USB-C Power-Delivery will do. Many are powerful enough to power a laptop so I did not check what is the minimum required. A 30W charger is certainly sufficient and inexpensive.

To find a suitable charger, simply search for "USB-C PD Charger" and if you select with 30W or more from the results, it will be able to power a Z6 II / Z7 II. One thing to note is that many USB-C chargers have more than one port now which is great for versatility but not all ports are always PD, so be sure to plug it into one that is labelled PD on the charger or whichever is specified in the manual. I figured this out accidentally after wondering why a charger was not providing enough power one day even though it was the day before!

For illustration purposes, here is nearly the one I have. Mine is the same brand and specification but an older version. In the main photo, you can see that the top port says PD. The PD letters missing on mine but the manual indicates which port is which.

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There are two type of USB chargers. Standard ones and "Fast charge" ones. The standard ones deliver around .5A (that has been the standard max output of USB ports on PCs for a while), while the fast charge ones can deliver 2.5A. These are also advertized as being able to recharge tablets (tablets have a bigger battery than phones, charging them with a .5A charger would take a whole day).

Note that the charger that comes standard with phones is usually a "slow" one, even if the phone itself boasts fast charge capability.

If you shop for one, a study by a French magazine demonstrated that many fast-charge chargers are of very low quality (voltage spikes, over-current protection, electric noise pollution (important if you use PLC for home networking), so stick with good brands (I'm very happy with several Anker ones).

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  • FWIW, my fairly basic Samsung phone won't charge any faster than it drains when turned on unless the charger is supplying at least 1500mA/1.5A. – Michael C Dec 2 '20 at 8:10

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