The Hidden Risk: Charging Lithium Batteries in Escape Routes

The fire took place at a block of flats in Reculver Road in Lewisham

A recent fire in Lewisham highlights a growing and often underestimated danger in residential properties involving the charging of lithium-ion batteries in escape routes and common areas.

At approximately 11:15am on a Sunday morning, a serious fire broke out in a flat after an e-bike battery, which had reportedly been charging in the hallway for around 12 hours, suffered a catastrophic failure. The consequences were severe. One occupant was rescued suffering from smoke inhalation, while another, trapped by rapidly spreading smoke, was forced to escape via a third-floor balcony , sustaining serious injuries in the process.

This incident reinforces a critical fire safety principle: your escape route must always remain clear and protected.

Why Lithium Batteries Are So Dangerous

Lithium-ion batteries, commonly found in e-bikes, e-scooters, and other personal devices, pose a unique fire risk. When they fail, they can:

• Ignite rapidly with little warning

• Produce intense heat and toxic smoke

• Cause explosive fire behaviour

• Spread fire quickly to surrounding materials

  
  

Failures can occur due to:

• Overcharging or prolonged charging periods

• Use of incompatible or poor-quality chargers

• Physical damage or impact

• Manufacturing defects

  
  

The Risk to Escape Routes

Charging these batteries in hallways, corridors, or near front doors creates a direct threat to life safety.

In a fire scenario:

• The escape route can become blocked almost instantly

• Smoke can spread rapidly, cutting off exits

• Occupants may be forced to take dangerous alternative escape actions (as seen in this case)

Escape routes are designed to provide a protected path to safety — introducing a high-risk ignition source into this space undermines that protection entirely.

Key Fire Safety Advice

To reduce the risk of lithium battery fires:

• Never charge batteries in escape routes such as hallways, stairwells, or near exit doors

• Avoid charging overnight or when unattended

• Use only manufacturer-approved chargers and batteries

• Do not use damaged or modified batteries

• Charge in a well-ventilated area, away from combustible materials

• Install and maintain working smoke detection

For landlords, managing agents, and responsible persons, this is also a compliance issue. Under fire safety legislation, escape routes must be kept clear and safe at all times. Allowing or overlooking battery charging in these areas could expose occupants to significant risk and potential legal consequences.

A Growing Concern

Incidents involving lithium-ion batteries are increasing year on year, particularly with the rise in e-bike and e-scooter use. These are not isolated events, they represent a developing fire risk that must be actively managed.

Final Thoughts

This incident serves as a stark reminder that small decisions, like where a battery is charged can have life-changing consequences.

At 20A Limited, we regularly identify blocked or compromised escape routes during fire risk assessments. If lithium battery charging is taking place in these areas, immediate action is essential.

Fire safety is not just about compliance, it’s about ensuring people can get out safely when it matters most.