Battery Safety at Work: Risks You Can Prevent

A swollen laptop battery, a charger that is hot enough to be uncomfortable, or a power-tool pack left on a bench overnight can look like minor housekeeping issues. They are not. Battery safety is a practical workplace control that can prevent fire, electric shock, damage to property and avoidable disruption to your operation.

For duty-holders, the challenge is that batteries now appear almost everywhere: laptops, mobile phones, radios, torches, cordless tools, e-bikes, cleaning equipment, emergency lighting and portable medical or care equipment. Many are reliable when used correctly, but their risks increase quickly when equipment is damaged, poorly charged, stored badly or bought from an unreliable source.

Why battery safety needs active management

Most rechargeable workplace batteries are lithium-ion or lithium-polymer types. They store a large amount of energy in a compact unit. If a cell is crushed, punctured, overheated, overcharged or internally defective, it can enter thermal runaway. This is a rapid self-heating failure that may release flammable gases, smoke and intense heat. A battery fire can develop fast and may re-ignite after it appears to have stopped.

That does not mean every lithium-ion battery is inherently unsafe. It means the controls need to match the equipment, how often it is used and where it is charged. A single company phone charged on a clear desk presents a very different risk from a fleet of power-tool batteries charged together in a workshop or an e-bike stored in an escape route.

Battery risks are also not limited to fire. Damaged cables and counterfeit chargers can expose users to electric shock. A loose battery compartment, corroded terminals or leaking alkaline cells can damage equipment and create contact hazards. Button batteries demand particular care where children, residents, pupils or visitors may be present, as ingestion can cause severe internal injury.

Battery safety starts before charging

The best time to control a battery risk is before an appliance is connected to the mains. Staff should be encouraged to carry out simple user checks, particularly on frequently moved equipment. They do not need to diagnose faults. They need to recognise warning signs and know that a suspect item must be removed from use.

Look for cracking, dents, bulging, leakage, discolouration, scorch marks, an unusual smell, loose terminals and signs that a charger, plug or cable has been strained. A battery that loses charge unusually quickly, takes far longer than expected to charge, becomes excessively hot or causes equipment to shut down without warning should also be investigated.

Do not continue using equipment simply because it still works. A charger can supply power while its cable insulation is damaged, and a battery can charge while its internal condition is deteriorating. Isolate the item, label it clearly to prevent reuse and arrange competent assessment or replacement.

Portable Appliance Testing has a useful role here, but it must be understood correctly. Formal visual inspection and electrical testing can identify defects in the appliance, plug, lead and charger, as well as earth continuity, insulation and other electrical faults where applicable. It cannot prove that every internal battery cell is healthy. Good compliance combines test results with user checks, asset records, recall research and practical decisions about condition and use.

Safe charging arrangements in offices and managed premises

Charging is where poor habits commonly become normal. A row of chargers plugged into a multi-way adaptor under a desk may seem harmless until leads are damaged, ventilation is blocked or an unsuitable extension lead becomes overloaded. In holiday accommodation, care settings and educational premises, unattended charging can be especially difficult to monitor.

Use the manufacturer-supplied charger or a verified compatible replacement with the correct voltage, current and connector. Cheap lookalike chargers and counterfeit products may lack the protection built into genuine equipment. They can overheat, deliver unstable power or fail to disconnect properly. Product recalls and credible safety alerts should be checked before equipment is accepted into service.

Charge batteries on a firm, non-combustible surface with clear space around them. Keep them away from paper, upholstered furniture, bedding, cleaning chemicals and stock packaging. Never cover a charger or battery with clothing, files or other items that trap heat. Do not charge on escape routes, in cupboards without suitable controls, or where a developing incident could block a doorway.

Avoid leaving charging equipment running overnight unless there is a documented reason, a suitable designated area and controls appropriate to the risk. This is particularly relevant for higher-capacity tool batteries, mobility equipment and e-bikes. The manufacturer’s instructions matter: some equipment is designed for docked charging, while other batteries should be disconnected once charged. A blanket rule can be less effective than a clear, equipment-specific procedure.

Battery safety controls for workshops, schools and care settings

The setting changes the risk. A workshop may need a charging station for multiple cordless-tool batteries. A school may manage tablets and science equipment used by many people. A care business may rely on hoists, communication devices or mobility equipment where availability is as critical as safety.

In these locations, assign ownership. Someone should know what batteries are held, which chargers belong to them, where charging is allowed and what happens when an item is reported as faulty. Without ownership, unsafe equipment tends to move from one cupboard, classroom or vehicle to another until it fails at the worst possible time.

A designated charging area should be tidy, ventilated and easy to inspect. Keep incompatible equipment separate and avoid piling batteries together, particularly if they have exposed terminals. Protect spare packs from impact and prevent metal objects such as keys, screws or tools from bridging contacts. For larger operations, a suitable fire-resistant charging cabinet or enclosure may be justified, but it is not a substitute for sound charging practice or correct equipment selection.

Where business continuity depends on battery-powered equipment, keep a controlled reserve of approved spares and record their condition. This reduces the temptation to use damaged packs because a team has no alternative. It also makes replacement decisions more predictable and easier to budget for.

Storage, transport and disposal are part of the control

Batteries do not stop being a risk when they leave the charger. Store them cool and dry, away from direct sunlight, heaters and sources of ignition. Do not leave devices in hot vehicles, on window ledges or beside radiators. Extreme heat shortens battery life and can worsen an existing defect.

When transporting spare batteries, protect terminals from short circuit and keep packs secure so they cannot move, fall or be crushed. This is particularly relevant for engineers, caretakers and maintenance teams carrying tool batteries between sites. A damaged pack should not travel loosely in a van with tools and metal fittings.

Do not place batteries in general waste. Damaged, swollen or leaking batteries need extra care and should be kept away from combustible materials while disposal arrangements are made. Follow the manufacturer’s instructions and your local approved recycling or hazardous-waste route. If a battery is hot, smoking, hissing or visibly venting, keep people away, raise the alarm and follow your site emergency procedure. Do not attempt to handle it unless this can be done safely and staff have suitable training.

Records turn good intentions into evidence

A pass sticker alone does not tell a duty-holder what equipment is on site, whether it has been recalled, where it is used or why it was removed from service. A complete asset register makes battery safety manageable. It should identify the appliance, charger and location, record inspection and test outcomes, retain certificates and show any remedial action.

Risk assessments should reflect actual use, not just the item type. A phone charger used occasionally in a supervised office has a different inspection frequency from a cordless drill used daily in a dusty workshop. Likewise, a guest’s personal charger cannot always be formally tested before use, but premises can still set sensible rules for charging, extension leads and reporting damaged items.

At Electrotech Services, formal inspection is supported by documented asset records and scrutiny of visible defects, unsafe adaptors, recalls and suspect products. That wider view helps duty-holders act before an appliance becomes an incident, rather than merely recording that it was present on test day.

Give staff a simple route to report concerns

The strongest procedure is the one people will actually use. Tell staff, tenants or site users who to contact, where to place faulty items and what they should not do. Avoid blame when someone reports a damaged cable or overheating battery. Early reporting is a safety success, not an inconvenience.

A short briefing can cover the warning signs, the approved charging locations and the rule that damaged batteries must not be reused, dismantled or placed in ordinary bins. For larger premises, periodic formal visual inspections help reinforce these habits between electrical testing visits.

The practical test is straightforward: if a battery or charger makes someone pause because it looks damaged, feels unusually hot or behaves differently, treat that pause as useful information. Isolate it, record it and have it checked. That small decision can protect people, premises and the continuity of the work taking place inside them.