Guide · Fire Safety
E-bike and e-scooter charging: the new fire risk in rented homes
Fire services across the UK have spent recent years warning about a hazard that barely existed a decade ago: lithium battery fires from e-bikes and e-scooters, typically during charging, often in hallways. For landlords the risk lands in the worst locations — escape routes and shared spaces — and the response is management and communication, since no bespoke statute yet governs it.
Fire Safety
Why are lithium battery fires a distinct kind of hazard?
Because of how they fail: a damaged or defective lithium cell can enter thermal runaway — a self-accelerating release of stored energy producing intense heat, jets of flame and toxic gas, developing in seconds rather than minutes and resisting the smothering that ends ordinary domestic fires. The fire behaves less like burning contents and more like an energetic event.
The failure triggers cluster around abuse and mismatch: physical damage from crashes or drops, overcharging on incompatible chargers, counterfeit or salvaged batteries, and DIY conversion kits of uncertain provenance. The battery that fails is rarely the reputable manufacturer's pack on its own charger — which is precisely what guidance to tenants should emphasise.
Fire Safety
Why do these fires so often start in the worst places?
Because charging follows sockets and security: riders bring machines inside to prevent theft and charge them where the plug is — hallways, under stairs, by front doors. A battery entering thermal runaway in a hallway puts the fire on the escape route itself, which is the scenario fire services keep citing when they publicise these incidents.
Overnight charging compounds it: failures during sleep meet closed doors and slow discovery, and a route blocked by burning equipment defeats the entire escape strategy. The location-and-timing pattern, more than the raw frequency, is why this risk earns attention disproportionate to its incident count.
Fire Safety
What can a landlord actually control here?
The framework, not the machines: tenancy terms and house rules addressing where charging and storage happen (never on protected escape routes), the fire risk assessment in HMOs updated to consider the hazard, welcome-pack guidance on safe charging, and inspection habits that notice batteries and conversion kits parked in hallways.
What a landlord cannot do is prohibit tenants' lawful possessions arbitrarily — the defensible position regulates location and behaviour on safety grounds rather than banning ownership. Rules framed around the escape route ('nothing charges or is stored in the hallway or on the stairs') sit on solid fire-safety ground and read as protection, not control.
Fire Safety
How should HMOs handle storage and charging?
As a designed provision, because the pressure is highest there: multiple riders, shared hallways and the strongest theft incentives to bring machines inside. Where demand exists, the workable answers are external secure storage, designated charging locations away from escape routes chosen with the fire risk assessment, and unambiguous house rules the licence file can show.
The assessment is the anchor document: a shared building where e-bikes are present and unaddressed is carrying a known, publicised hazard its assessment ignores — a poor look in any post-incident review. A dated assessment entry, a stated policy and induction evidence together convert an emerging risk into a managed one.
Fire Safety
What guidance should tenants be given?
The fire services' core advice, passed on plainly: charge with the manufacturer's charger and follow its instructions; don't charge sleeping or absent; charge away from escape routes and exits; stop using any battery that is damaged, swollen, hot or smelling; buy batteries and conversion kits from reputable sources; and never block the hallway with the machine.
Add the building-specific layer: where charging is permitted here, where storage is, and what to do on failure — get out, close doors behind you, call the fire service, and never fight a battery fire or move a burning pack. Two minutes at check-in, repeated in the welcome pack, is the whole intervention.
Fire Safety
How does this risk interact with alarms and detection?
Directly: fast-developing fires reward early detection, and the alarm provision in circulation spaces — where charging tends to happen — is what buys the warning time these events otherwise consume. A building whose alarm estate is current, tested and correctly sited is already carrying the best single mitigation for this hazard.
It is also a reason charging location rules matter to detection strategy: batteries charging in rooms without detection, or in cupboards that delay smoke reaching a sensor, subtract from whatever the alarm system was designed to deliver. The rule of thumb travels well: charge where a working alarm would hear it early, never where escape would meet it.
Fire Safety
What does a proportionate landlord response look like?
Policy, assessment, communication, inspection: a tenancy or house-rule clause keeping charging and storage off escape routes; the HMO fire risk assessment updated where the hazard is present; welcome-pack guidance carrying the fire services' advice; and the routine route walk watching for machines and batteries where they shouldn't be. All low-cost, all documented.
Proportionate cuts both ways: this is a real, current hazard deserving explicit management — and it is not a reason to ban bicycles, search rooms or treat every tenant as a risk. The landlord who regulates locations, informs occupants and keeps the escape route sacred has done what the emerging consensus asks, and has the file to show it.
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FAQ
Related questions, answered
How often should alarms be tested?
The landlord must evidence working alarms at the start of each tenancy in England; regular testing during the tenancy is typically the tenant's day-to-day role, with the landlord responsible for repair or replacement when told of a fault. Recording a test at each visit is good practice.
What records should I keep?
Dated confirmation that alarms were tested working at tenancy start (commonly in the inventory with photographs), locations and types of each alarm, expiry dates, and notes of any repairs or replacements — quick evidence if your local council ever asks.
What are the tenant's responsibilities for alarms?
Routine testing during the tenancy, not removing batteries or units, and reporting faults promptly. The landlord's duty to repair or replace is triggered when the fault is reported.
Are alarm standards higher for HMOs in your area?
Usually — HMO licensing from your local council commonly specifies mains-powered, interlinked systems with heat detection in kitchens, at a higher grade than single-let minimums. Your licence conditions and fire risk assessment define the specification.
How long does an alarm check take?
Usually 15 to 30 minutes for a typical property — checking presence, position, expiry dates and test-button function per alarm, then recording the results. It combines naturally with inventory, gas or electrical visits.
Do my alarms need to be interlinked?
In Scotland, yes — interlinked alarms are the standard in all homes. In Wales, rentals need interlinked mains smoke alarms. In England there is no general interlink requirement for existing single lets, though HMO standards and new-build regulations can require it.
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