From:
Neal Langerman <chemsaf**At_Symbol_Here**GMAIL.COM>
Subject:
[DCHAS-L] New fire type classification
Date:
Feb 10, 2026 18:51 UTC
Reply-To:
chemsaf**At_Symbol_Here**gmail.com
Message-ID:
<CAOo07ZqHiV-4P6QPa_u9vofXFD0dP9U4nJTwV+ZJsYYBheypUA**At_Symbol_Here**mail.gmail.com>
In-Reply-To:
BS ISO 3941:2026 has been published with a revision that adds a new fire classification for lithium-ion (Li-ion) battery fires.
BSI confirmed the update reflects the growing use of Li-ion batteries across the built environment, from large energy storage systems to electric vehicles and personal mobility devices.
The standard classifies fires according to the nature of the material undergoing combustion.
The latest revision introduces Class L as a dedicated category for Li-ion cells and batteries where no metallic lithium is present.
If you have questions about lithium battery safety, I am available to try to answer them.
Neal
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NEAL LANGERMAN, PhD
+1 (619) 990-4908
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