The ground floor of the two-storey terraced house was fully destroyed by fire believed to have been caused by the catastrophic failure of a battery pack on an e-bike.
Most of the first floor was also damaged. A small part of the roof of the affected property and a neighbouring property were damaged by the blaze. One e-bike was also damaged and removed from the property before the arrival of the Brigade.
Firefighters are issuing an e-bike safety reminder after a house fire on Daintry Close in Harrow.
Four people left the property before the Brigade arrived. Two men were taken to hospital by London Ambulance Service crews.
A London Fire Brigade spokesperson said: “E-bikes and e-scooters are London’s fastest-growing fire risk. If you own an e-bike or e-scooter, there are a number of things you can do to help keep yourself and those around you safe.
“Converting pedal bikes into e-bikes using DIY kits bought online can be very dangerous. They can pose a higher risk of fire. Get a professional or competent person to carry out the conversion and make sure to buy a battery from a reputable seller and that it is not second-hand. 
“When charging your e-bike or e-scooter, make sure you are using the correct charger. Mismatching the charger increases the risk of fire. It’s also important not to overcharge and to unplug the charger once it’s completed charging. Never charge an e-bike or e-scooter unattended or whilst you’re sleeping and don’t charge it on an escape route, such as in a hallway. Instead, charge or store the device outdoors or in 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.”
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the ground floor of the two-story Terrace House was fully destroyed by fire and most of the first floor was also damaged a small part of the roof of the affected property and a neighboring property were damaged by The Blaze one ebike was also damaged and removed moved from the property before the arrival of the Brigade four people left the property before the Brigade arrived two men were taken to hospital by London Ambulance Service Crews the fire is believed to have been caused by the catastrophic failure of a battery pack on an ebike when charging your ebike or E scooter make sure you are using the correct charger mismatching the charger increases the risk of fire it’s also important not to overcharge and to unplug the charger once it’s completed charging never charge an ebike or E scooter unattended or whilst you’re sleeping and don’t charge it on an escape rout such as in a hallway instead charge or store the device Outdoors or in 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 ebikes and E Scooters are powered by lithium batteries lithium batteries store a significant amount of energy in a very small space and are much more powerful compared to other types of batteries if that energy is released in an uncontrolled way then a fire or explosion may result if there is overheating crushing penetrating or overcharging then a fault can occur within damaged battery cells which may cause the battery to catch fire and or explode many of the fires have involved secondhand vehicles or the bike has been modified using Parts bought online at this time there is not the same level of regulation of products for ebikes and E scooters sold bya online marketplaces or auction sites when compared to High Street shops so the Brigade cannot be confident that products meet the correct safety standard never block your Escape Route with anything including ebikes and E Scooters store them somewhere away from a main through route Our advice is to store these items in a safe external location if possible such as a garage or a shed always use the correct charger otherwise the risk of fire increases and buy an official one from a reputable seller do not attempt to modify or tamper with your battery always follow the manufacturer’s instructions converting pedal bikes into ebikes using DIY kits bought online can be very dangerous they pose a higher risk of fire get a professional or competent person to carry out the conversion and make sure to buy a battery from a reputable seller and that it is not second second hand check your battery and charger meets UK safety standards we have particular concern where batteries have been purchased from online marketplaces and when they’ve been sourced on the internet which may not meet the correct safety standards consumers buying any product can check that the item displays a UK CA or C Mark that ensures that the products meet UK and EU safety health or environmental requirements if buying online buy from a UK supplier watch out for signs that the battery or charger aren’t working as they should EG if the battery is hot to the touch or has changed shape let the battery cool before charging batteries can get warm during their use and it is advisable to allow them to cool down before attempting to recharge as they could be more susceptible to failure if overheated if you are charging batteries indoors please follow our advice on safe charging unplug your charger once it’s finished charging always follow manufacturer’s instructions when charging and we would advise not to leave it unattended or while people are asleep