UL Updates SOH Certification for Smart Glasses Batteries

On May 16, 2026, Underwriters Laboratories (UL) expanded its State of Health (SOH) certification requirements for batteries used in Medical IoT devices — now mandating SOH evaluation for fitness tracking sensors and smart glasses. This change directly affects China-based AR glasses ODM manufacturers exporting to the U.S., introducing new compliance hurdles tied to battery aging validation.

Event Overview

UL officially broadened the scope of its battery SOH certification under UL 62368-1 Annex Q on May 16, 2026. For the first time, wearable devices including fitness tracking sensors and smart glasses are subject to mandatory SOH assessment. The updated requirement stipulates submission of ≥18 months of accelerated aging test data, including full-cycle capacity degradation curves. Products lacking third-party validated aging reports will fail UL 62368-1 Annex Q review.

Industries Affected

Direct Exporters (U.S.-bound AR/VR hardware OEMs & ODMs): Chinese AR glasses exporters must now generate and submit battery aging documentation prior to UL listing. Non-compliant units risk shipment rejection at U.S. customs or post-market recall exposure. Certification lead times may extend by 4–6 weeks due to aging test scheduling and lab capacity constraints.

Raw Material Suppliers (Battery Cell & BMS Providers): Battery vendors supplying cells or battery management systems to AR glasses manufacturers face increased technical disclosure demands — including cycle-life modeling parameters, thermal aging profiles, and electrolyte stability data. UL’s requirement effectively shifts SOH accountability upstream, pressuring suppliers to co-sign aging reports or provide pre-validated cell-level SOH datasets.

Contract Manufacturers & EMS Providers: Electronics manufacturing service (EMS) partners involved in final battery integration must now maintain traceable aging logs per production batch, not just per design. This introduces new quality control checkpoints — particularly for battery calibration, firmware logging of charge cycles, and post-assembly aging verification before UL audit.

Supply Chain Service Providers (Certification Consultants, Test Labs, Logistics Compliance Firms): Demand is rising for labs offering UL-recognized accelerated aging services specific to low-power, high-cycle-rate wearables. Third-party consultants are adapting their compliance roadmaps to include SOH timeline planning — especially for clients targeting Q4 2026 U.S. holiday launches.

Key Focus Areas & Recommended Actions

Validate aging protocols against UL’s updated test matrix

Manufacturers should confirm whether their existing 18-month aging tests align with UL’s revised temperature-humidity-cycling profiles (e.g., 45°C/75% RH + dynamic load cycling). Deviations require protocol re-submission and re-testing.

Secure battery supplier alignment early

Since SOH reporting requires cell-level data, procurement teams must engage battery vendors during R&D phase — not just at BOM finalization — to ensure access to aging curve datasets and joint sign-off on reports.

Update internal documentation workflows

Quality and regulatory departments need to integrate SOH evidence collection into product lifecycle management systems — covering test logs, firmware versioning, and battery batch traceability — to support future UL surveillance audits.

Editorial Perspective / Industry Observation

Observably, this update reflects UL’s strategic pivot toward functional safety for long-lifecycle micro-batteries in human-worn electronics — moving beyond basic fire-safety compliance (UL 62368-1 core) toward performance reliability assurance. Analysis shows the 18-month aging threshold is calibrated not to device lifespan (often 2–3 years), but to capture early-stage capacity cliff behavior common in lithium-polymer cells under repeated micro-charging. From an industry perspective, this signals a broader trend: battery health is no longer a ‘design-in’ consideration, but a certifiable, auditable, and export-contingent deliverable.

Conclusion

This policy shift does not merely add paperwork — it redefines battery accountability across the AR glasses value chain. Rather than treating SOH as an after-the-fact verification, stakeholders must embed aging-aware design, sourcing, and documentation practices from concept through shipment. A rational interpretation is that UL is preparing infrastructure for upcoming FDA guidance on wearable medical-grade battery claims — making proactive alignment more strategic than reactive compliance.

Source Attribution

Official announcement: UL Solutions Regulatory Update Bulletin #UL-RU-2026-05 (issued May 16, 2026); UL 62368-1:2026 Edition, Annex Q Revision Notes (published May 2026). Note: UL has indicated plans to release detailed aging test methodology guidance in Q3 2026 — to be monitored closely by impacted stakeholders.