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Lithium Ion battery safety tips

Guy KN6WET

Ham Operator
Club Member
Joined
Mar 12, 2026
Messages
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Location
Fresno
Posted on Facebook and reprinted as a public service announcement from the Fresno Fire Department

Here’s a reminder of how quickly a routine morning can turn into an emergency.
This morning, a Fresno family woke up to find a lithium-ion battery that had been charging overnight sparking and smoking inside their home. Thankfully, the residents were able to evacuate safely and firefighters quickly removed the battery and electric scooter before the situation escalated and caused significant damage.
Lithium-ion battery fires continue to increase across the country. These batteries power many everyday devices, including e-bikes, e-scooters, tools, phones, and other rechargeable equipment. While generally safe when used properly, damaged, defective, or improperly charged batteries can fail and ignite without warning.
Lithium-ion Battery Safety Tips:
• Only use manufacturer-approved batteries and chargers.
• Do not leave batteries charging longer than necessary.
• Disconnect batteries from chargers once charging is complete.
• Charge batteries on hard, non-combustible surfaces.
• Keep batteries away from exits, combustible materials, and direct sunlight.
• If a battery begins to smoke, spark, swell, or emit an unusual odor, move away and call 911
A few simple precautions can help prevent a fire and keep your family safe.
 
Good advice, Guy. I make it a habit to charge my 50Ah and 100Ah batteries in the garage, not indoors. I also check for smoke often. When leaving home, I make sure the charging is either complete, or continue it later.
 
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