Swollen, Dropped or Recalled: What to Do With a Battery You No Longer Trust

Safety guide

The most dangerous lithium-ion battery in most homes and workshops is not the one nobody thought about. It is the one somebody already suspects: the pack that looks a bit swollen, the drill battery that was dropped off scaffolding, the e-bike battery that came with a recall email nobody actioned. It is still sitting on a shelf, in a cupboard, or worse, still going on charge.

Batteries rarely fail without warning. In most incidents there was a period, sometimes days or weeks, where something was visibly or behaviourally wrong and the battery kept being used anyway. That window is the whole opportunity. What follows is a practical decision guide for what to do with a battery you no longer trust.

Seven reasons to retire a battery immediately

Any one of these means the battery comes out of service now, not at the end of the job.

What you see	What it usually means	Action
Swelling, bulging, a case that no longer sits flat or a pack that will not seat properly	Gas build-up inside the cells from electrolyte breakdown, an advanced warning sign	Retire immediately, do not charge
Impact damage: dropped, crushed, run over, punctured or a dented casing	Possible internal short circuit, which can develop into runaway hours or days later	Retire, isolate, observe
Water ingress, submersion or long exposure to rain	Corrosion and internal shorting, common with e-bikes and site tools	Retire, do not dry and reuse
Heat, unusual smell, hissing, or a case that is hot well after charging finished	An active fault, not a maintenance issue	Treat as an emergency, see below
Charging behaviour has changed: much faster, much slower, will not hold charge, cuts out	Cell degradation or a failing battery management system	Retire and replace
The battery, charger or device is subject to a recall	A known defect the supplier has been required to act on	Stop use, follow the recall instructions
It has been charged with a non-genuine or mismatched charger	Overcharging and cell damage that may not be visible	Inspect, retire if any other sign is present

Australian recall data is worth taking seriously here. Recalls covering tens of thousands of units have been issued across e-bikes, e-scooters, power banks and tool batteries, and the check takes two minutes on the Product Safety Australia site.

The four mistakes people make with a suspect battery

• Putting it in the kerbside bin. A damaged cell crushed in a collection truck or a sorting line is one of the leading causes of fires in the waste and recycling chain, with industry estimates running to five figures a year nationally. It is also illegal in a growing number of jurisdictions.
• Charging it one more time to see. Charging is the highest-risk state for a compromised cell. There is nothing useful to learn from the test and a great deal to lose.
• Storing it in the house. A suspect battery in a hallway cupboard, under a bed or on a shelf above a workbench puts the failure point next to combustibles and across an escape route.
• Leaving it in a vehicle. A car in Australian summer sun is an oven, and elevated temperature is one of the things that pushes a marginal cell over the line.

What to do instead: isolate, observe, dispose

The goal between the moment you stop trusting a battery and the moment it is properly disposed of is simple. If it fails, it should fail somewhere that does not take the building with it.

1. Disconnect and stop charging. Remove it from the device or charger if that can be done without force or further damage.
2. Let it sit and watch it. If it has just been dropped or has been charging hard, give it time somewhere open and non-combustible. Internal shorts can take hours to develop into a thermal event.
3. Isolate it in a containment bag. A dedicated fire-resistant bag is the practical control here: it contains and slows a thermal event and limits spread to whatever is around it. Tape over exposed terminals first so nothing can short across them.
4. Store it away from the building fabric. A garage floor, a shed, a non-combustible external store, away from exits, vehicles, fuel, aerosols and anything you cannot replace. Where you would notice a problem, not where nobody goes.
5. Book the disposal, do not defer it. Quarantine is a holding step measured in days, not months.

The premium fire-resistant containment bag is sized for exactly this job. Internal dimensions are 42 x 38 x 22cm, which takes most e-bike and e-scooter packs, power tool batteries, laptops, power banks, drone and camera batteries, or several smaller cells together. Construction is dual layer: a silicone-coated fibreglass exterior over a heat-reflective aluminium lining, rated to 1100 degrees C instantaneous and 550 degrees C sustained. It weighs 1.9kg, closes with a heavy-duty zip, and has reinforced handles and backpack straps so a battery can be carried out or driven to a drop-off point without being loose in the boot.

Disposing of it properly

Never in the kerbside bin, and never in the recycling bin. Australian options:

• B-cycle drop-off points. The national battery recycling scheme has thousands of collection points in hardware stores, supermarkets, battery retailers and council facilities. Loose cells and device batteries are straightforward.
• Council community recycling centres. Most take household batteries free, and many now take larger e-bike and e-scooter packs. Ring ahead for anything damaged or swollen, because a damaged pack often needs to be declared and handled separately.
• The retailer or manufacturer. For a recalled battery this is usually a required step, and for e-bike and tool brands there is often a take-back path.
• Licensed e-waste and battery recyclers. The right answer for workplace volumes and for anything damaged. Look for certification to AS/NZS 5377:2022.

Tape the terminals before transport, keep the battery in its containment bag, and tell the receiving site that it is damaged rather than leaving it in a general bin on arrival.

For workplaces: build a quarantine point

In a workshop, warehouse, hire fleet or trade business, "someone will deal with it" is how suspect batteries end up in a store room next to the packaging. Set up the alternative once and it runs itself:

• A designated quarantine location, non-combustible, away from charging areas, exits, stock and vehicles, with containment bags kept there rather than fetched from elsewhere.
• A simple rule everybody knows: swollen, damaged, wet, hot, or recalled means it goes to quarantine, no judgement call required, no permission needed.
• A register, even a clipboard. Date, battery, reason, who quarantined it, disposal date. This is the evidence of due diligence a regulator or insurer will ask for.
• A scheduled disposal run, monthly or by volume, to a licensed recycler.
• It in the induction. New starters and labour hire will not know your rule unless somebody tells them. Our online awareness courses cover the warning signs and the response for exactly this reason.

Stocked in Australia and dispatched within 48 hours.

This article is general guidance only and does not replace a site-specific risk assessment, your emergency plan, manufacturer instructions or the direction of emergency services. In any fire, call 000 first. Product specifications are current at the time of publication.