USB rechargeable 9V battery

[Bamboopictures]

The Unitek 900mAh 9V battery is a convenient and economical way to run your camera's mixer or your Rode Videomics

https://www.aliexpress.com/item/UNI...7282-4ea4-8511-ff873fd83136&priceBeautifyAB=0

 

[Octarine]

Technically I would question how a 9V battery can be charged with 5V from USB.
Commercially I would be very very careful reading such lines:

Due to stock clearance,real capacity maybe 600-700mah,we don't accept any dispute for it.please take second consideration before
buying,thanks.