u/Angry_argie

Number one seems to be "K&F Concept" brand, with unidirectional valve for air intake and exhaust, and number two ("VSGO" brand) has air filters, but it doesn't specify anything about valves (but having a filter would be pointless without valve, right). I'd appreciate any recommendation or experiences with these or similar products (these 2 seem to be the best available ones in my country ATM)

https://preview.redd.it/mneqc55brl0h1.png?width=840&format=png&auto=webp&s=26b5cd36d0c79f8467c257f444b08285603848cb

I want a PB as a backup to power my new mirrorles camera (not to recharge its battery). For what I read 27w is ideal, so I found that Xiaomi model. Everything points to it likely being a PD brick (quick charge, in/out in the same USB C, 9A=3A), except that it is not written anywhere in the product specifications!

https://www.mi.com/global/product/xiaomi-33w-power-bank-20000mah-integrated-cable/specs/?hl=en-US

If anyone has used it and can confirm, I'll happily buy one. Otherwise I'll go up one model, that does specify having PD.