Lithium Ion batteries are awesome for Surfire lights; but pay attention:
- Only use good lithium ion batteries in devices.
- Do not mix new and old batteries!
Lithium Battery Hazard Warning
There have been numerous reported incidents, industry wide, of off-brand
Lithium batteries exploding or catching fire resulting in property and personal
injury. Additionally, the use of these inferior batteries may damage your equipment.
Battery manufacturers recommend not mixing new and used batteries or different
brand batteries together as this may increase the risk of leakage, fire or
explosion. It is recommended that you do not, puncture, short-circuit,
disassemble or heat batteries above 212°F (100°C). It is also recommended
that you do not recharge the batteries unless they are specifically designed as
rechargeable batteries and then only in accordance with manufacturer’s
On August 19, 2009, an officer with the U.S. Marshalls Service in New York, NY,
reported an incident in which an Insight Technology Incorporated M6X tactical
illuminator with CR123 batteries caught fire. An investigation into the cause of
the fire was conducted by the U.S. Department of Homeland Security, Bureau of
Customs and Border Protection, who requested that SureFire, LLC conduct
testing to determine the cause of the incident. SureFire’s investigation concluded
“[c]ustomer/User did not follow instructions or cautions for use, operation, and/or
maintenance of or replacement of batteries for SureFire, LLC brand and/or other
manufacturer. In the majority of cases where equipment has been damaged by
primary cells sighting battery failure as the cause, the customer and/or user has not
maintained nor followed the recommended procedures by the battery or equipment
manufacturer. Evidence of the returned remains is showing one battery is of a
different brand and is not domestically manufactured in the U.S.A.