A new class action alleges Anker sold a 24,000 mAh power bank that only contains 4,000 mAh.

On Oct. 13, 2026, Rene Schimmer filed a class action lawsuit against Fantasia Trading LLC, d/b/a Anker Innovations, in the U.S. District Court for the Central District of California.

The lawsuit alleges Anker overstates the battery capacity of many of its portable power banks, including the 737 Power Bank (PowerCore 24K).

The allegations

Anker sells compact, rechargeable power banks that charge phones, tablets, cameras and other devices through a USB connection. A power bank's milliamp-hour rating describes how much current its battery can deliver over time, the lawsuit claims. It says Anker's ads treat that number as the main difference between one power bank and the next.

The company reportedly charges more as the mAh rating rises and sorts its website listings into three groups by mAh alone. The 737's name includes PowerCore 24K, shorthand for the advertised 24,000 mAh battery, according to the complaint.

The proposed class action alleges the 737 holds six battery cells each rated at 4,000 mAh. Those cells are wired in a chain, which raises the battery’s voltage but not its mAh, according to the lawsuit. It contends the 737 therefore only contains 4,000 mAh, less than 17% of the advertised 24,000.

The back of the 737 allegedly lists its battery capacity as 4,000 mAh at 21.6 volts. However, the filing points to a second line in Chinese that lists a rated capacity of 13,500 mAh. Shoppers do not see those ratings until after they buy and unbox the device, according to the lawsuit.

Schimmer contends the stated mAh capacity was a deciding factor when he bought the 737 and other Anker power banks. He alleges he overpaid and acquired a lower-capacity power bank than he would have if the 737 had the battery capacity Anker advertised.

The legal claims

The lawsuit brings three claims under California consumer protection laws, all of which focus:


  • Consumers Legal Remedies Act, which bars businesses from claiming their products have characteristics or quantities they do not have

  • False Advertising Law, which bars untrue or misleading advertising

  • Unfair Competition Law, which bars unlawful, unfair or fraudulent business practices

The class action seeks money back for buyers, the profits the charger maker made from the alleged violations and a court order stopping the challenged advertising. The lawsuit leaves room to add a damages request under the Consumers Legal Remedies Act later.

What this means for Anker power bank buyers

The proposed class covers everyone in the United States who bought an Anker power bank at retail from four years before the filing through class certification. There is no settlement, no claims process and no money available at this time.