I'm looking for a portable external power solution so I can shoot extended periods on my A7Sii.
I've searched dummy battery power supplies - anyone know the reliability of these...?
Andoer NP-FW50 Fully Decocded DC Coupler Dummy Battery Adapter
Using a power supply like this that has DC output and can be strapped to a tripod:
Ultra Edition ® 8000mAh Black coloured portable power bank
Would this be a suitable solution?