This is one of the Chinese reports on the issue: https://m.thepaper.cn/newsDetail_forward_31048287
Excerpt from the report above (translated using Google):
> The Paper learned from an insider that Anker Innovations' battery cell supplier is already a leading battery cell supplier in the industry, and did not inform customers after it changed materials. In addition to Anker Innovations, the supplier also cooperates with leading power bank brands, so the impact is huge. Although Anker Innovations did not name the supplier, an insider pointed out that the supplier was Amprius.
UPDATE:
There's an exclusive interview by 36kr with one of Anker's VPs:
> Amprius Technologies, Inc. has never developed or manufactured batteries for power banks. For accuracy, please attribute the certification issue to Apex (Wuxi), not Amprius. Recent reports have incorrectly linked Amprius Technologies, Inc. to a battery certification issue. The company involved is Apex (Wuxi) Co., Ltd., formerly known as Amprius (Wuxi) Co., Ltd., a Chinese lithium battery manufacturer based in Wuxi, China.
> Apex (Wuxi) was once a subsidiary of Amprius Inc. but was never part of Amprius Technologies, Inc. In early 2022, Apex was spun off, renamed, and has operated independently since, with no ties or relationships to Amprius Technologies, Inc.
(source: https://www.gizchina.com/2025/07/14/anker-baseus-romoss-amon...)
The fact that it was so successful, and that zuck picked mobile to be the next big thing before many of his peers and against what managers in the company wanted to do is probably what has made him now overconfident that he can do it again
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