A house was destroyed and two vehicles damaged damaged after a fire broke out in north-west London on Thursday night.
Firefighters have urged Londoners to make sure they have working smoke alarms fitted in their homes following the blaze in Sudbury Avenue, Wembley.
It is thought there were no smoke detectors at the two-storey property.
The fire is believed to have been accidental and caused by the “catastrophic” failure of a lithium battery in a power bank, London Fire Brigade said on Friday as it warned people to take care when charging batteries.
Around 60 firefighters in eight fire engines were scrambled to Sudbury Avenue on Thursday night, where they spent two hours fighting the blaze.
A 32m ladder was also deployed to the scene to fight the fire from height.
London Fire Brigade (LFB) received its first call about the fire shortly after 3.30pm. It was under control by around 5.35pm.
The ground floor, first floor, and roof space of the house were all damaged, along with two vehicles that had been parked outside.
Nobody is believed to have been injured.
"This incident also shows just how important it is to have working smoke alarms fitted on every level of your home,” said an LFB spokesperson on Friday.
“Smoke alarms give the earliest possible warning when a fire starts and we would urge everyone to make sure they have one fitted in every room where a fire can start except kitchens or bathrooms where heat alarms are more appropriate.”
They added: “Lithium batteries are susceptible to failure if incorrect chargers are used, so it’s important to always use the correct charger for the product and buy an official one from a reputable seller,
"You should unplug your charger when you have finished using it and we would advise not to leave it unattended or charging while people are asleep.
“Batteries can present a fire risk if they’re over-charged, short circuited, submerged in water or damaged, so it’s really important to protect them against being damaged too.
“Try to ensure they are not getting knocked around while in use or while being carried as this can increase the chance of damage to cells.”
