Was $89 at PB Tech, now $28.99. That's about 67% off. (though it is seen at around $55 frequently)
This is the CCC certified version, so it carries the 3C mark you need to take a power bank on domestic flights in China. It's 36Wh, which is well under the 100Wh airline limit.
It also has a thermistor for battery temp monitoring and an aluminium heat spreader.
very high quality and compact power-bank, had one myself since 2025. it can do 20v to charge laptop etc
Some very solid deals on Anker and Cuktech in this sale