Officials: Battery-powered scooters possible cause of destructive house fire in Medford

MEDFORD, Mass. — Battery-powered scooters were most likely the cause of Sunday’s four-alarm house fire in Medford, said State Fire Marshal Peter J. Ostroskey.

Investigators determined the origin and cause of the fire began in the first-floor laundry room where two badly-damaged, electric scooters were located. Officials said that the fire rapidly spread from that point, causing major damage to the structure and displacing all four residents.

“Lithium-ion batteries contain a tremendous amount of power in a small package. When they burn, they burn extremely hot, release toxic gases, and can re-ignite even after the fire has been extinguished,” said Medford Fire Chief John Freedman. “It’s vitally important to use, store, and charge them safely according to the manufacturer’s instructions.”

Medford Firefighters responded to the area of 43 Allston St. following multiple 9-1-1 calls at about 4:55 on Sunday afternoon. On arrival, crews battled massive flames spewing throughout the two-family home.

Firefighters battled the flames from all sides of the structure for about two and a half hours before bringing it under control. One nearby home sustained exterior heat damage as well.

Three occupants were able to escape, one of whom was transported to the hospital for medical care.

“Lithium-ion batteries are growing in use, and they power everything from pocket-sized devices to motor vehicles,” said Ostroskey. “It’s important to follow the manufacturer’s instructions and use the manufacturer’s batteries and charging equipment rather than generic or aftermarket items.”

Fire officials also recommended the following safety guidelines:

• Store scooters and e-bikes outdoors if possible. If you must store them indoors, keep them and their batteries clear of doors, windows, and stairways.
• Charge the battery directly from a wall outlet, not an extension cord or power strip. Place it on a hard and stable surface, not a bed, couch, or pillow.
• Charge only one battery or device at a time and unplug it when it’s fully charged. Don’t allow a charged battery to continue charging.
• If you notice changes to the battery or the device, including damage, an unusual odor, a change in color, too much heat, a change in shape, leaking, smoking, or not keeping a charge, stop using it and take it to a qualified professional for repair.
• If and when it’s time to dispose of the battery, don’t put it in the trash. Lithium-ion batteries should be recycled, and you can find a location to take them at

This is a developing story. Check back for updates as more information becomes available.

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