HPQ Silicon's Endura+ receives UL 1642 certification

Executive Summary

• HPQ Silicon Inc. has secured UL 1642 certification for its HPQ Endura+ lithium-ion battery cells, clearing the final major regulatory barrier for commercial sales in the United States.
• The certification applies to both the 18650 (4,000 mAh) and 21700 (6,000 mAh) cell formats, confirming compliance with U.S. safety standards required by original equipment manufacturers (OEMs) and integrators.
• With this achievement and the previously announced UN 38.3 transport certification, HPQ has completed its core U.S. regulatory framework, allowing the company to transition from technical validation to direct commercial engagement and supply chain integration.

Key Details

• Certification Received: UL 1642, the core safety standard for lithium-ion cells in the U.S. market.
• Applicable Products: HPQ Endura+ lithium-ion cells in two formats:
  • 18650 format: 4,000 milliampere-hours (mAh).
  • 21700 format: 6,000 milliampere-hours (mAh).
• Safety Compliance: The certification confirms the cells meet safety requirements under real-world and abuse conditions, including:
  • Short-circuit protection.
  • Resistance to overcharge and forced discharge.
  • Thermal stability.
  • Mechanical integrity under impact and crush conditions.
  • Tolerance to electrical and mechanical abuse.
• Strategic Impact:
  • Removes key qualification hurdles for U.S. OEMs and integrators.
  • Enables direct engagement with North American customers in electronics, mobility, embedded systems, and professional equipment markets.
  • Allows commercial conversations to focus on performance, scalability, and integration rather than regulatory risk.
• Regulatory Status: Completion of UL 1642 follows the earlier UN 38.3 transport certification (announced Dec. 16), finalizing the core regulatory requirements for U.S. commercialization.
• Next Steps: The company is positioned to move from certification activities to customer engagement, qualification programs, volume planning, and partnership structuring in the U.S.

Notable Quotes

• "Certifying at the cell level is where real market access begins in the United States... For HPQ Endura+, this removes a key qualification hurdle, and allows commercial conversations to focus on performance, scalability and integration rather than regulatory risk." — Bernard Tourillon, President and CEO
• "HPQ Endura+ is no longer being evaluated as a development program, but as a compliant product platform that can be integrated into existing supply chains. That credibility allows us to move from technical validation to commercial execution, including customer qualification, volume planning and partnership structuring in the U.S." — Bernard Tourillon, President and CEO