Hi,
what portable power bank or power station are you using ?

I use the Anker PowerCore III 19,200mAh Huge Capacity 60W Power Delivery Portable Charger.

I got myself an Anker too, though this one is an Anker PowerCore Metro Essential 20000 (20,00 mAh, as the name states.) Using it with my Pocket 2. The trickle-charge mode comes in very handy for creating timelapses that last for multiple hours. Tested once how long it could carry on, starting at low power on Pocket 2. After eight hours, I thought I wouldn't need to record THAT long at a time, gave up and stopped recording. So yeah, I could say it has been *adequate* for me at least.

it all depends on what you need to charge. For a P4, an M300, a computer and a fridge, I use this thing to mount it in the back of my car on a platform.
https://villager.eu/products/vgp-2700-s-generator

Powerbanks are good if you have enough to recharge them themselves. I use this model before needing more power:
https://www.studiosport.fr/stati ... ecoflow-a22456.html
Very effective