Four fire engines and around 25 firefighters were called to a house fire on Roman Road in East Ham.
Part of the ground and first floors of a mid-terrace house were damaged by fire. There were no reports of any injuries.
The Brigade's Fire Investigators believe the fire was accidental and involved lithium-ion batteries.
A London Fire Brigade spokesperson said: “It’s important to always use the correct charger for the product and buy an official one from a reputable seller. Batteries can get warm during their use and it is advisable to allow them to cool down before attempting to re-charge as they could be more susceptible to failure.
“You should always make sure you unplug your charger once it’s finished charging. Always follow manufacturers’ instructions when charging and we would advise not to leave it unattended or while people are asleep."
The Brigade was called at 1409 and the fire was under control by 1449. Fire crews from Barking, Whitechapel, Plaistow and East Ham fire stations attended the scene.