CPSC Reviews UL 4200A-2026 For Button Cell And Coin Battery Products

The US Consumer Product Safety Commission published a notice on 3 September 2026 seeking comments on UL 4200A-2026, the revised voluntary standard for products containing button cell or coin batteries. Comments were due by 17 September; that period has closed.

The notice did not immediately replace the mandatory standard incorporating UL 4200A-2023. It opened the statutory review process under Reese's Law.

How A Revision Becomes Mandatory

CPSC may reject all or part of a revision within 90 days of notification if it concludes that the change does not improve safety. A revision not rejected becomes mandatory 180 days after notification, unless CPSC specifies a later date.

The printed notice gives the notification date as “August XX, 2026”. It therefore does not establish the exact day from which to calculate that timetable. CPSC expressly attributes the short comment period to the statutory review timetable.

Existing Product Requirements

16 CFR Part 1263 incorporates the 2023 standard and adds requirements. Compartments containing replaceable button cell or coin batteries generally require a tool, or at least two simultaneous and independent movements, to open. Covered products also face use-and-abuse tests and warning requirements.

Part 1263 excludes zinc-air button cells. Toys for children under 14 are exempt from this part where they comply with the applicable battery-accessibility and labelling requirements under the toy-safety standard. These exclusions do not establish exemptions from every separate battery-packaging obligation.