HPQ and Novacium Achieve 395 Wh/kg in Semi-Solid Drone Battery Pack Using GEN4 Silicon Anode Material and Announces Engagement of European Focused Investor Awareness & Digital Outreach Services

• Semi-solid 8S drone battery pack delivers 15,900 mAh and 395 Wh/kg at the pack level, among the highest reported energy densities for comparable flight-ready drone battery systems, based on publicly available information
• Performance represents an estimated 23–36% improvement over selected publicly available LiPo and NMC drone battery pack benchmarks at the pack level [1]
• Results further support GEN4 as a format-flexible platform, now demonstrated across multiple battery architectures, including cylindrical, liquid-electrolyte, and semi-solid systems

MONTREAL, Canada — HPQ Silicon Inc. (“HPQ” or the “Company”) (TSX-V: HPQ) (OTCQB: HPQFF) (FRA: 8PY1), today announced that a semi-solid electrolyte 8S drone battery pack integrating Novacium’s GEN4 silicon anode material has achieved 15,900 mAh capacity, 457 Wh total energy, and 395 Wh/kg at the pack level. The battery pack, weighing 1,160 g, was produced by a commercial subcontractor and tested under controlled conditions [2].

Conventional lithium-polymer (“LiPo”) drone battery packs operating in similar 8S configuration typically achieve 290-320 Wh/kg at the pack level based on publicly available data [1]. The GEN4 semi-solid configuration delivers 395 Wh/kg [3], representing an estimated 23–36% improvement over selected publicly available drone battery pack benchmark, while maintaining a sub-1.2 kg pack mass. This level of performance is not commonly achieved in in comparable flight-ready drone battery using conventional chemistries [2].

“These results highlight GEN4’s ability to deliver consistent performance across different battery architectures,” added Dr. Jed Kraiem, COO of Novacium. “The semi-solid electrolyte environment complements the structural stability engineered into GEN4, enabling high-capacity operation.”

These results further support GEN4 silicon anode material as a platform technology capable of operating across multiple battery architectures.

Performance has now been demonstrated across:

(i) 21700 cylindrical cells exceeding 7,000 mAh [4],
(ii) multi-configuration drone battery packs (8S2P, 8S3P, 6S3P) [5], and
(iii) semi-solid electrolyte systems, as reported in recent releases.

This cross-format validation reinforces the material’s adaptability and potential for commercial integration.

“This new milestone validates our GEN4 technology and confirms that it’s not limited to a single format or chemistry,” said Bernard Tourillon, President and CEO of HPQ Silicon. “To our knowledge, this performance ranks among the highest reported for comparable semi-solid drone battery systems, based on publicly available information.”

“More importantly, it reinforces GEN4 as a scalable platform technology, supporting our decision to advance toward industrial production,” added Mr. Tourillon.

Through its exclusive North American commercialization rights under the HPQ ENDURA+ brand, HPQ—together with Novacium—now benefits from access to industrial production capabilities spanning multiple battery formats and chemistries. This positions the Company to scale high-performance battery solutions across targeted applications, including mobility, defense, and advanced electronics.

Stakeholders seeking additional technical context are invited to consult the accompanying technical blog, which provides further detail on testing methodology and performance results.

Engagement of European Focused Investor Awareness & Digital Outreach Services

HPQ has entered into an agreement with Apaton Finance GmbH (“Apaton”), a European-based capital markets communications firm, based in Hannover Germany (email: [email protected]) to provide investor awareness and digital outreach services aimed at increasing the Company’s visibility among European and international investors. The engagement will support HPQ’s ongoing efforts to communicate recent technical and commercialization progress to a broader global audience.

The agreement is for an initial term of 6 months, beginning on April 15, 2026, for a cash consideration of € 16,000 per month. Apaton and HPQ are arm’s length parties, and Apaton does not hold any securities of the Company. “As HPQ transitions from technology validation to commercial execution, expanding our visibility within the global investment community is a strategic priority,” said Bernard Tourillon, President and CEO.

REFERENCE SOURCES

[1] Based on data compiled from publicly available information sources, included but not limited the information found on the following links https://www.grepow.com/semi-solid-state-battery.html , https://www.ayaauavpower.com/news/lipo-drone-battery-2/?utm_source=chatgpt.com, https://www.herewinpower.com/product-category/drone-battery/standard-high-rate-battery/.
[2] Internal capacity testing results derived from a commercial-ready semi-solid 8S drone battery pack incorporating GEN4 silicon anode material, with the battery pack manufactured by a third-party contractor and testing conducted by Novacium under controlled conditions.
[3] Based on a 15,900 mAh (15,9 Ah) capacity, an 8S nominal voltage of 28.8 V (3.6 V/cell), corresponding to 457 Wh of total energy, and a total pack weight of 1.160 kg, resulting in ~395 Wh/kg at the battery pack level.
[4] >7,000 mAh per cell, as reported in the April 15, 2026 press release
[5] As reported in the April 22, 2026 press release