Three Amazon Jump Starter Sellers Seek a Declaration That They Do Not Infringe Shenzhen Zhanpusida's Emergency Starting Power Supply Patent.

The complaint

The case is Ningboyixuankuajingdianzishangwuyouxiangongsi, Shenzhen He'an CE Trading Co., Ltd., and Shenzhen Manhui E-Commerce Co. v. Shenzhen Zhanpusida Technology Co., Ltd., No. 2:26-cv-02423 (W.D. Pa.). The eleven-page complaint, ECF No. 1, was filed November 11, 2026. It pleads a single count for a declaratory judgment of non-infringement under the Declaratory Judgment Act, 28 U.S.C. 2201 and 2202, and demands a jury.

The complaint describes each plaintiff as a company organized under the laws of China that sells on Amazon.com: Ningboyixuankuajingdianzishangwuyouxiangongsi as MAIDELI us, based in Ningbo, and Shenzhen He'an CE Trading Co., Ltd. as heancepower and Shenzhen Manhui E-Commerce Co. as manhuipower, both based in Shenzhen. It alleges, on information and belief, that the defendant is a Chinese company based in Shenzhen, and it lists the defendant as the applicant and assignee on the patent. Venue is pleaded on the ground that the defendant is not a United States resident.

The patent

U.S. Patent No. 12,171,079, titled Emergency Starting Power Supply for Vehicle, issued December 17, 2024, from Application No. 18/608,984, filed March 19, 2024. The patent has 18 claims. Claim 1 covers an emergency starting power supply for vehicles with a shell, a power source, a circuit board, and an output terminal, where the power source and circuit board sit in a first accommodating space in the shell, at least part of the output terminal sits in a second accommodating space in a first mounting part, the output terminal outputs a current for starting the vehicle's engine, and a first coupling part on the output terminal is detachably connected to a second coupling part on the mounting part. The complaint alleges that the plaintiffs have not infringed any valid claim of the '079 patent, directly or indirectly, literally or under the doctrine of equivalents.

The Amazon complaints

The complaint alleges that Amazon notified Shenzhen Manhui E-Commerce Co. on October 27, 2026, and the other two plaintiffs on October 28, 2026, of patent infringement complaints that the defendant submitted under the '079 patent, and it lists four accused jump starter ASINs: B0G8ZNZPJK and B0G8Z717HJ for manhuipower, B0GJRPKG8B for heancepower, and B0D4V8ZC5P for MAIDELI us. It alleges that Amazon removed the listings as a result. It alleges, on information and belief, that beginning in late October 2025 the defendant repeatedly lodged infringement complaints with Amazon against a large number of competitors in the jump starter segment.

The earlier suits in the same court

The complaint says the defendant filed a patent infringement suit against six entities in the Western District of Pennsylvania on November 24, 2025, No. 2:25-cv-01826, on two other patents in the same family, and voluntarily dismissed all six about three weeks after they answered. It lists four declaratory judgment suits against the defendant in the same court, Nos. 2:25-cv-02027, 2:26-cv-00312, 2:26-cv-00313, and 2:26-cv-01534, involving the '079 patent or other patents in its family, and says each of those other family patents issued from a continuation of the '079 patent's application. It pleads personal jurisdiction on the ground that this case arises from the same facts as those suits, and alternatively under Federal Rule of Civil Procedure 4(k)(2).

The relief requested

The plaintiffs ask for a declaratory judgment that they do not and have not ever infringed the '079 patent; a preliminary and permanent injunction barring any assertion of the patent against the accused products, requiring the defendant to give written notice of the injunction to those it binds and to Amazon, and requiring it to ask Amazon to reinstate any affected products deactivated because of its Amazon complaints; a judgment that the case is exceptional under 35 U.S.C. 285; attorneys' fees and costs; and other relief the court deems just.

What to watch next

Watch for service on the defendant, any answer or infringement counterclaim, any motion for a preliminary injunction, and any notice relating the case to the earlier suits.