There's widespread issues with power banks in China, with a new CCC certification required, and recently something about upgraded enforcement because previously certified devices having been found to have issues.
I'd rather go with a brand that does proper costly recalls over one that just lets everybody keep the dangerous products around.
The difference here is that Anker will recall a faulty product. Lesser known brands will not. If you know of another brand that has a better safety and reliability record, please share.