This post was last modified: 2020-01-28, 22:02 by c_joerg.

My currently preferred solution for powering my camera is a power bank with quick charge and a quick charge USB tester. This tester then simulates a quick charge device.

I then operate the camera directly with the 9V and have an output power of 18W (9V / 2A). Alternatively, I could also operate a slider with 12V and a maximum of 1.5A.

Since there is only one DC / DC converter in this chain, the total power loss is about 15% lower. There is also no influence on two DC / DC converters.
Powerbanks with QC are available from € 10, which is significantly cheaper than powerbanks with 9V or 12V output.

Similar testers are also available for PD (Power Delivery). With the testers you should make sure that there is a slide switch and no buttons. Those with the buttons must be reprogrammed after each switch on.

https://www.ebay.de/itm/QC3-0-QC2-0-USB-...SwT8ZdB0cj

[Image: https://live.staticflickr.com/65535/4945...3411_b.jpg]

Good Idea! I'd love to test that, but those devices don't seem to be available in Germany, and shipping from China currently might take very long...

I'm also waiting for my second adapter ...

If you are afraid to operate your camera with 9V, you can also connect a diode in series for safety and would then come to 8.3V.

You could also use QC3. Then you can set everything between 3.6 and 22V in 0.2V steps. However, I have not found an adapter with fixed switches. You have to reset the voltage after each switch-off.

So how do you connect the dummy battery to that adapter?

Sent mobile...

I cut a normal USB cable and the original cable for the dummy battery. Then I connected both cables.

You could also solder the dummy battery cable directly to the adapter.

This post was last modified: 2020-03-02, 19:40 by c_joerg.

The four round dots on the adapter are solder points.

It is described here that this adapter will remember last selection when power is removed and automatic restore it again when power comes back. With QC3 voltages in 0.2V steps are possible.
https://lygte-info.dk/review/USBmeter%20...%20UK.html

This post was last modified: 2020-05-28, 21:34 by c_joerg.

I have now bought the adapters linked in post #7. Work really well. They remember the last setting and you can use Quick Charge 3 to set the voltage in 0.2V steps.

What is the advantage of using this QC tester compared to a finished battery dummy with USB connection and step up converter?
I use one on a power bank with QC and it works very well

https://www.real.de/product/342922450/
Regards,
Hans

This post was last modified: 2020-06-12, 22:21 by c_joerg.

With 2 DC / DC converters in series you lose more power (15-20%).

The maximum output power at QC is higher (18W) compared to normal powerbank (5V * 2.4A = 12W).

The adapter you linked contains a DC / DC converter that increases the voltage. I have a similar one. If you have a power bank with 5V / 2A, you only have about 1.2A at 8V. For my EOS M3 I need at least one power bank with 2.4A output. I need at least 3A for my DSLR.

As you can read on the link, you need a power with DC 5V 2.4-3.6A. I have never seen a powerbank with 5V/3,6A on one port.