VoltStar Technologies v. Shenzhen Bai Ying Hui: USB Charger Patent Dispute Settled in 110 Days
VoltStar Technologies filed suit against Shenzhen-based AILKIN charger maker Bai Ying Hui in Florida’s Southern District, asserting two USB wall charger patents against a line of dual-port fast-charging blocks. The parties reached settlement within 110 days — a resolution timeline consistent with early negotiation rather than protracted litigation.
USB charger IP clash ends in rapid settlement before discovery closes
VoltStar Technologies, Inc. filed this patent infringement action on July 16, 2025 in the U.S. District Court for the Southern District of Florida against Shenzhen Bai Ying Hui Technology Co., LTD — the manufacturer behind the AILKIN brand of USB wall chargers sold on Amazon. VoltStar asserted two patents: US9024581B2 and its reissue USRE48794E, both covering dual-port USB wall charger technology with fast-charging capability. The accused products span five distinct AILKIN charger SKUs featuring foldable designs, USB-C Power Delivery, and QC3.0 charging technology.
The case closed on November 3, 2025 — just 110 days after filing — when the court received a notice of settlement. The court ordered the parties to file a joint stipulation of dismissal by December 1, 2025, and noted that the dismissal would be self-executing upon filing per the Eleventh Circuit’s Anago Franchising standard. The basis of termination is recorded as voluntary dismissal, with the public record silent on whether the dismissal carries prejudice designation, financial consideration, or licensing terms.
A 110-day resolution in a multi-patent, cross-border infringement case against a Chinese manufacturer is notably fast and suggests either pre-litigation dialogue or swift commercial resolution once suit was filed. The involvement of Sriplaw, PA — a firm with a documented practice in e-commerce IP enforcement — and the absence of any defendant counsel on record are consistent with a pattern of default risk motivating early settlement. What remains unknown is whether the resolution included a licensing arrangement, a one-time payment, or a product redesign commitment.
Filing to Voluntary dismissal in 110 days
110 days — notably swift for a multi-patent infringement action in S.D. Florida
Voluntarily dismissed: what the settlement notice means for both parties
Self-executing dismissal under Anago Franchising standard
The court invoked the Eleventh Circuit’s Anago Franchising, Inc. v. Shaz, LLC framework: upon filing of a joint stipulation of dismissal, the case closes automatically without requiring a separate court order. This mechanism is procedurally efficient but means the court retains no ongoing jurisdiction to enforce settlement terms unless the parties separately file their agreement for court review — which the order expressly leaves optional.
Voluntary dismissal — Anago procedureWith or without prejudice? The public record is silent
The basis of termination is recorded as ‘Voluntary dismissal’ without specifying whether the dismissal is with or without prejudice. This distinction matters significantly: a with-prejudice dismissal bars VoltStar from re-filing the same claims; a without-prejudice dismissal leaves the door open. The court order does not resolve this question, and the joint stipulation — which typically specifies prejudice terms — had not been filed as of the case closure date visible in the public record.
Prejudice status — unconfirmedVoltStar’s patents remain unchallenged on the merits
No invalidity ruling, no claim construction, and no IPR was resolved in this proceeding. US9024581B2 and USRE48794E survive with their enforceability intact. VoltStar retains the right to assert both patents against other market participants — and the settlement, if it included royalty or licensing terms, may strengthen the commercial case for future enforcement actions against competing AILKIN-style products.
Patents remain enforceableBai Ying Hui exits without a public merits adjudication
Shenzhen Bai Ying Hui avoided a potentially costly default judgment — no defendant counsel appeared on record during the 110-day proceeding. Settlement forecloses a public invalidity finding that could have benefited other USB charger manufacturers. Whether Bai Ying Hui must alter its product designs or pay ongoing royalties is not disclosed. Other Chinese e-commerce charger brands facing VoltStar claims cannot rely on this case as precedent for a validity challenge.
No public merits rulingFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | VoltStar Technologies, Inc. | Company | USB charging technology IP holder — asserts US9024581B2 and USRE48794ESearch in Eureka ↗ |
| Defendant | Shenzhen Bai Ying Hui Technology Co., LTD | Company | Shenzhen-based manufacturer of AILKIN-brand USB wall chargers sold via AmazonSearch in Eureka ↗ |
| Plaintiff counsel | George Nicholas Colville | Attorney | Counsel for VoltStar Technologies, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Joel Benjamin Rothman | Attorney | Counsel for VoltStar Technologies, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Layla Nguyen | Attorney | Counsel for VoltStar Technologies, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Sriplaw, PA | Law Firm | Representing VoltStar Technologies, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Sriplaw | Law Firm | Representing VoltStar Technologies, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Florida Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order reflects a purely administrative settlement-acknowledgment procedure — no claim was adjudicated on its merits. The reference to Anago Franchising signals that the Eleventh Circuit’s self-executing dismissal standard applies: the court retains no jurisdiction post-stipulation unless the parties affirmatively file their settlement agreement. The phrasing ‘closed for administrative purposes’ confirms that the substantive claims under US9024581B2 and USRE48794E were never tested, leaving both patents’ validity and infringement scope legally unresolved.
US9024581B2 & USRE48794E — dual-port USB wall charger fast-charging technology
US9024581B2, filed under application number US12/124515, covers dual-port USB wall charger technology incorporating fast-charging circuitry — the core architecture found in compact plug-in power adapters sold widely for smartphones and tablets. USRE48794E is a reissue of that original grant, filed under US16/209373, suggesting VoltStar sought to refine or expand claim scope after the original patent issued — a common prosecution strategy to capture design variants that emerge as the market evolves. Together the two patents form an overlapping claim structure covering the fast-charging power delivery and physical form factor at issue in this case.
The USB wall charger market — particularly the foldable, dual-port, multi-protocol segment targeted at iPhone and Android flagship users — is intensely competitive and dominated by Amazon marketplace imports from Shenzhen-based manufacturers. A patent covering the fundamental architecture of this form factor carries significant commercial leverage: the accused AILKIN product line spans at least five distinct SKUs with USB-C PD and QC3.0 capability, suggesting broad market coverage. For competitors in this space, the reissue patent’s broadened claims represent a meaningful expansion of VoltStar’s enforcement perimeter beyond what the original grant alone would support.
Should you run an FTO against US9024581B2 and USRE48794E?
Any company designing, importing, or distributing dual-port USB wall chargers — particularly foldable plug form factors with USB-C Power Delivery or QC3.0 fast-charging — should treat these two VoltStar patents as live FTO risks. The combination of an original patent and a reissue creates layered claim coverage that is more difficult to design around than a single grant. Amazon marketplace sellers, U.S. distributors of Shenzhen-origin charger products, and OEMs supplying private-label charging accessories are all within the apparent enforcement perimeter suggested by this action.
PatSnap Eureka’s FTO Search Agent can map the full claim scope of US9024581B2 and USRE48794E against your product specifications, identify prosecution history estoppel boundaries from the reissue filing, and surface prior art that could support an IPR petition if challenge becomes necessary. Eureka’s citation analysis also flags related VoltStar applications that may be pending — giving product and legal teams early warning before the next enforcement wave reaches your SKU.
Run a freedom-to-operate analysis on US9024581B2 to assess your product’s exposure
Run FTO in Eureka →Similar USB charger patent infringement cases in U.S. federal courts
Cases involving USB wall charger and fast-charging technology patents in the Southern District of Florida and related federal courts — including Amazon seller enforcement actions.
What this case signals for the USB charger IP enforcement landscape
VoltStar’s rapid settlement against an Amazon-marketplace seller is consistent with a broader enforcement strategy targeting import-channel charger brands.
Sriplaw’s e-commerce enforcement model targets Amazon-listed importers
Sriplaw, PA specialises in IP enforcement against online marketplace sellers. A 110-day settlement with no defendant counsel on record suggests this case followed a demand-to-settle playbook rather than full litigation. Brands selling consumer electronics on Amazon should treat this pattern as a live enforcement risk — particularly where products overlap with dual-port USB charger form factors.
Reissue patent USRE48794E signals deliberate claim broadening
The presence of a reissue patent alongside the original US9024581B2 indicates VoltStar actively broadened or clarified its claims after grant — a strategy that often expands the infringement perimeter. Product teams designing USB wall chargers with foldable plug, dual-port, or fast-charging features should treat both patents as active FTO risks, not just the original grant.
VoltStar v Shenzhen — key questions answered
VoltStar Technologies asserted two patents: US9024581B2 (application US12/124515) and its reissue USRE48794E (application US16/209373). Both relate to dual-port USB wall charger technology incorporating fast-charging circuitry. The accused products were five AILKIN-brand USB wall charger SKUs sold by Shenzhen Bai Ying Hui Technology Co., LTD on Amazon.
The case was resolved by voluntary settlement. On or around November 3, 2025, the court received a notice of settlement and ordered the parties to file a joint stipulation of dismissal by December 1, 2025. The dismissal was to be self-executing under the Eleventh Circuit’s Anago Franchising standard. The public record does not disclose financial terms, licensing arrangements, or whether the dismissal was with or without prejudice.
A reissue patent is granted when the original patent contains errors or when the patentee seeks to broaden or narrow claims within two years of grant. USRE48794E is a reissue of US9024581B2, suggesting VoltStar broadened its claim scope after the original grant. For FTO purposes, the reissue may capture product designs that the original claims did not reach — making it essential to analyse both patents independently rather than treating them as equivalent.
Yes — the settlement resolved the case without any merits adjudication. No invalidity finding, claim construction ruling, or IPR decision was issued. US9024581B2 and USRE48794E remain fully enforceable. The settlement does not constitute any legal determination on validity or infringement, and neither patent was challenged on the merits in this proceeding.
The Eleventh Circuit’s Anago Franchising, Inc. v. Shaz, LLC, 677 F.3d 1272 (11th Cir. 2012) holding provides that a joint stipulation of dismissal under Fed. R. Civ. P. 41(a)(1)(A)(ii) is self-executing — it becomes effective upon filing without requiring court approval. In this case, the court confirmed that upon filing of the joint stipulation, the dismissal is effective automatically, and the court retains no jurisdiction to enforce settlement terms unless the parties separately file their agreement for court review.
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