Device Battery Safety: Storage, Charging and Shipping

Device fleets accumulate batteries, and batteries are the one component in a hardware estate with genuine safety requirements attached. Most organisations manage them casually until something prompts a review.

Why batteries need more care than other components

Lithium cells store a lot of energy in a small space, and damage or defect can release it rapidly. That is why they carry handling, storage and transport requirements that a hard drive does not.

The risk is not evenly distributed. It concentrates in damaged, swollen, aged or poorly stored cells — which is exactly what accumulates in a fleet that has been running for a few years and never had its batteries reviewed.

None of this makes them dangerous in normal use. It makes the exceptions worth handling deliberately.

Recognising a battery that should be removed

Four signs, and any of them means take it out of service rather than watch it.

Swelling. A battery that no longer sits flat, or a device whose casing has started to separate or whose screen is being pushed out. This is the clearest sign and it should never be ignored or squeezed back into place.

Physical damage. Dents, punctures or crushing, including from a drop that seemed minor.

Heat. A battery or device that becomes unusually hot in normal use or while charging.

Leakage or smell. Any fluid or unusual odour.

A swollen battery in a device that still works is still a battery that should be removed. Staff need to know what to look for and that reporting it is expected rather than an inconvenience — which is a training point as much as a policy one.

Storage

Where most avoidable problems come from.

Cool and dry. Heat accelerates ageing and increases risk. A box of spare batteries on a shelf above a heater, in a vehicle in summer, or in an unventilated comms room is the wrong place. Our airflow guide covers why those rooms run hotter than people think.

Not fully charged or fully empty for long periods. Cells stored at extremes age faster. A partial charge is better for anything sitting unused for months.

Terminals protected. Loose batteries in a drawer with metal objects can short. Keep them in their packaging, in trays, or with terminal covers.

Damaged cells separated immediately, in a location away from other stock, pending disposal.

Rotate stock. Batteries age whether used or not, so a spare bought three years ago and never fitted is not a fresh battery.

Charging

Three practices worth having.

Use the manufacturer’s chargers. Charging circuitry is matched to the cell, and generic chargers are a common factor in problems.

Charge somewhere sensible. Multi-bay chargers running overnight concentrate a lot of energy in one place. A ventilated area on a hard surface, not in a cupboard full of packaging materials.

Charge at room temperature. Charging cold damages cells, which matters where devices come in from chilled areas or vehicles and go straight into a cradle. Let them warm first.

Our fleet guide covers why charging infrastructure needs to be where workers are — and that placement decision should account for these points too.

Transport is regulated

The area most likely to catch an organisation out, because it applies to routine activities.

Lithium batteries are classed as dangerous goods for transport, with requirements covering packaging, labelling and documentation. The rules differ between batteries shipped loose, batteries packed with equipment, and batteries installed in equipment — and they differ by transport mode, with air being the most restrictive.

Three situations where this applies and is frequently overlooked.

Sending spares between sites. A box of loose batteries in an ordinary parcel is not necessarily compliant.

Returning faulty batteries or devices under warranty. Damaged or defective cells carry stricter requirements than healthy ones, and some carriers will not accept them at all. Our claims guide covers establishing this with a supplier before you need it.

International shipments, where the requirements sit alongside the customs considerations our importing guide covers.

Requirements vary by jurisdiction and change, so confirm what applies to your route rather than assuming — and tell your carrier what is in the package.

Disposal

Batteries do not go in general waste, and in most jurisdictions that is a legal requirement rather than a preference.

Two points.

Use a route that accepts lithium cells specifically, since not all electronics recycling does.

Damaged cells may need separate handling from healthy ones, so establish that with your disposal route rather than mixing them.

Keep a record of what was disposed of and when, alongside your asset records — the same discipline our decommissioning guide applies to other equipment.

What to put in place

A short list that covers most of it.

Somewhere cool, dry and ventilated for spare batteries, with terminals protected and stock rotated. A defined place to put a damaged or swollen battery immediately, away from other stock. Manufacturer chargers, in a sensible location, used at room temperature. A known compliant route for shipping batteries between sites and back to suppliers. A disposal route that accepts lithium cells. And staff who know what swelling looks like and that reporting it is expected.

Tracking battery health across the fleet also helps, since it turns replacement into a scheduled task before cells reach the age where problems concentrate.

Common questions

Requirements vary by jurisdiction and change — confirm what applies to your routes rather than assuming.