Firefighters have issued a reminder of their lithium-ion battery safety advice following a fire on Wood Lane in Hornchurch.
Most of a single storey building was damaged and four fence panels were destroyed by the fire. There were no reports of any injuries.
The fire is believed to have been accidental and caused by the catastrophic failure of a lithium-ion battery.
A London Fire Brigade spokesperson said: “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.
The Brigade was called at 1512 and the incident was over for firefighters at 1539. Crews from Hornchurch, Dagenham, Romford and Wennington fire stations attended the scene.