HPQ Silicon receives UN 38.3 certification for Endura+

Executive Summary

• HPQ Silicon Inc. has secured UN 38.3 certification for its HPQ Endura+ 18650 and 21700 lithium-ion cells, validating their safety and compliance for international transport and commercial distribution.
• The certification marks a strategic transition from research and development to industrial-scale commercialization, enabling the company to ship products globally and pursue supply agreements.
• The company is now preparing for UL1642 certification, a critical requirement for deploying these cells in the United States market.

Key Details

• Certification Obtained: UN 38.3 certification for lithium-ion batteries, confirming compliance with international safety and transport requirements.
• Certified Products:
  • HPQ Endura+ 18650 format (4,000 mAh).
  • HPQ Endura+ 21700 format (6,000 mAh).
• Technology Partner: Novacium SAS.
• Testing Compliance: Cells passed all eight mandatory UN 38.3 tests, including:
  • T.1: Altitude simulation.
  • T.2: Thermal cycling (-40°C to +75°C).
  • T.3: Vibration.
  • T.4: Shock.
  • T.5: External short circuit.
  • T.6: Crush/impact.
  • T.7: Overcharge.
  • T.8: Forced internal short.
• Performance Metrics:
  • Energy density: Greater than 300 watt-hours per kilogram.
  • Cycle life: Approximately 1,000 charge-discharge cycles.
  • Compatibility: Compatible with existing lithium-ion battery manufacturing infrastructure.
• Production Capacity: The company aims to reach up to 1.5 million cells per year via third-party production lines through its partnership with Novacium.
• Next Steps: Preparation for UL1642 certification for the U.S. market, which evaluates electrical safety, thermal resistance, and mechanical durability. Most UL-related tests have already been completed internally by Novacium.
• Commercial Status: Production started in August 2025; the company is now cleared for shipping, distribution, and industrial adoption in North America and internationally.

Notable Quotes

• "Obtaining UN 38.3 certification marks HPQ's transition from R&D and lab-scale testing into a fully compliant commercial and industrial phase," said Bernard Tourillon, president and chief executive officer of HPQ Silicon Inc. "We're proud to demonstrate that HPQ Endura+ cells are not only high performance products but also safe, certified and ready for global transport and export."
• "While we never doubted our ability to obtain these results, having an independent validation that our batteries cells can handle the rigorous testing protocol without any cells explosion, fire or leakage means that our batteries cells are in full compliance with international standards," added Mr. Tourillon.