The London Fire Brigade was alerted to the blaze in Castillon Road at 10.25pm on March 5.
Three fire engines and around 15 firefighters from stations across Lee Green, Lewisham and Forest Hill were dispatched to the scene.
Two men and a woman had jumped from the first floor flat before the arrival of the emergency services.
The majority of the flat was damaged in the fire which blew through an internal wall and into a bedroom, taking off the bedroom’s door.
A window in the room where the blaze started was also blown out.
The Fire brigade believes the cause of the fire was the failure of lithium batteries in an e-scooter at the property.
Station Com Paul Meyrick said: “This fire is yet another example of why we are so concerned about e-bikes and e-scooters and why we’re running our #ChargeSafe campaign to raise awareness of the fire risks associated with these vehicles.
“It was a really visible fire with flames coming out of the window. The Brigade’s 999 Control officers received 12 calls alerting them to the blaze.
“The fire happened in a room near the entrance to the flat leaving the occupants unable to escape.
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“It highlights the importance of never blocking an escape route with anything, including e-bikes and e-scooters.
“Store them somewhere well away from a main through route. Our advice is to store these items in a safe location if possible, such as a garage or a shed. If this is not possible, make sure the device is in a room where you can shut a door and contain a fire.”
The fire was under control by 12.34am.
