I'm planning to do a 4 night hike with my Nikon D850 using a lens warmer for a 14-24mm lens, and need a power bank to power both (will probably bring more than one for such a long hike).

I've read through some threads here, searched the internet, and think I've got this narrowed down to this power bank, which seems to be identical to the one that forum contributor ggtimelapse recommends, except this one is for the American market, not for Germany:

https://www.amazon.com/Volessence-Portab...07TC34H6G/

So, my questions:

1. Just want to confirm that this is a good power bank for powering D850 and lens warmer (as well as recharging LRT PRO Timer 3 once or twice)

2. Which lens warmer would be good for a Nikkor 14-24mm lens, available in the U.S.?

3. How many hours might this power bank power a D850 and a lens warmer?

Thank you.

I have a guest article in my German blog, which might interest you. Use Google Translate, if necessary.
https://gwegner.de/know-how/kaufempfehlung-powerbanks/

Hi natfrey, Gunther has already posted a link to my article. There you will find a lot of information about the powerbanks.
The Volessence Powerbank is the right choice if it is available. This PB is also available under other names (Litionite and Krsidonia Tanker 90W / 50.000mAh) just google it in US.
According to a rough calculation you can power the D850 and a lens heater for 20 hours (depending on the application).
For the power supply of the D850 you still need a battery dummy (EN-EL15) e.g.
https://www.amazon.com/-/de/dp/B081Z4W6C...53&sr=8-19

and my QCCP stick https://tlpbf.de/components/?lang=en

For the lens heater I would recommend to choose a 5V USB variant.

I hope I could help you.

Regards,
Hans

Thanks guys, for the very helpful info! How long would it take to ship a QCCP stick to the U.S.?

About 2-3 weeks

Hi Hans, I ordered 2 QCCP sticks and a HotSwap about two weeks ago, but didn't hear back from the website. But maybe that's good because since then I decided to get a Black Forest slider bundle and wondering which QCCP sticks and which HotSwap would be best for the Black Forest Profi bundle (with PINE controller, slider, pan, and tilt). I'm still reading over their documentation and watching their videos, when time allows. But thought I'd ask here first.

Also, I thought I could get away with a USB C dummy battery that hooked up directly to the power bank I got, but my Nikon D850 kept turning off, then back on, which would disconnect the WIFI connection to DSLR Dashboard on the smartphone. It would also cause the camera to skip some shots in the sequence. Clearly the power bank battery was of the type that turns off power when not enough draw in the current. Thanks again for all the super helpful explanations in Gunther's blog regarding this issue, which is translated pretty nicely into English with Google translate.

Hi Nathaniel,
I sent you the invoice to your hotmail.com email. Maybe in spam?
Hans

Hi Nathaniel,
if you are working with the BFM system, the QCCP stick and the PB HotSwap for the camera is the right part.
If you also want to provide uninterruptible power to the Pine controller, there are several options.
If you use a powerbank which has a 12V output, you need another PB HotSwap adapter.
For powerbanks with only USB and QC you need 2x the QCP-Stick 12V and a PB Hotswap.
Hans