First things first, no, it is not.
However, recent recalls and bans of power banks in china have sparked public concern over the overall safety of these devices.
The china branch of the american battery maker changed some parts in the battery cells without notifying them, which led to the recall of certain batches of their product.
As a result of the widely published ban, power banks catching fire or exploding, fanned the concern among users and authorities.
Customers were unable to return items due to delivery services banning the recalled batches.
The mandatory certification was introduced a year ago and many consumers are still using non-ccc-certified products.