Lithium Batteries: Why They Can Never Go in Your Bin
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A lithium battery in a kerbside bin is one of the most dangerous things you can put there. They're now a leading cause of fires in waste collection trucks and sorting facilities across Australia — fires that injure workers, destroy equipment and shut down recycling infrastructure for weeks.
They take about two minutes to dispose of properly, and they're free to drop off.
Why they catch fire
Lithium cells store a lot of energy in a small space, which is exactly why they're in everything. When one is crushed, punctured or short-circuited, it can enter thermal runaway — an internal reaction that generates its own heat, accelerating until the cell vents flame and burning gas.
The problem in a waste stream is mechanical. Collection trucks compact their load. Sorting facilities run material through crushers and conveyors. Both do precisely the thing that sets a lithium cell off, buried inside a mass of paper and plastic — ideal fuel.
These fires are also hard to extinguish. Thermal runaway is self-sustaining and can reignite hours after it appears to be out.
Where they hide
People think "batteries" and picture AAs. The risky ones are usually built into devices:
- Phones, tablets and laptops
- Vapes and e-cigarettes — a huge and growing contributor, because they're disposable by design
- Cordless power tools and their battery packs
- Bluetooth earbuds and speakers
- Electric toothbrushes and shavers
- Power banks
- E-bike and e-scooter batteries — large, high-energy, and the most serious of the lot
- Robot vacuums
- Children's toys and greeting cards with sound
- Cordless vacuums
If it recharges and doesn't plug into the wall to work, assume there's a lithium cell in it.
How to spot a damaged battery
A damaged cell is far more likely to ignite. Warning signs:
- Swelling or bulging — a laptop that won't sit flat, a phone with a lifting screen, a pack with a rounded face
- Heat when not in use or charging
- Hissing, clicking or a sweet chemical smell
- Leaking or discolouration
- A device that was dropped hard and has behaved oddly since
If you see any of these: stop charging it, stop using it, move it away from anything flammable, and put it somewhere cool on a hard non-combustible surface. Don't press it, don't puncture it, and don't put it in any bin.
Storing them safely before disposal
- Tape the terminals on loose batteries with clear sticky tape. This prevents short circuits, and it's the single most effective safety step.
- Store in a non-flammable container — not a cardboard box of loose odds and ends in a hot garage.
- Keep them cool and dry, away from direct sun.
- Don't accumulate a big pile. Drop them off periodically rather than saving up a year's worth.
Where to take them
Battery recycling in Australia is genuinely easy and free. Most supermarkets and major hardware stores have a drop-off bin near the entrance, and many councils run collection points. Australia's national battery stewardship scheme has drop-off points across Sydney — a quick search will find your nearest.
Larger batteries — e-bike, e-scooter and power tool packs — often need a specific drop-off point rather than a supermarket bin. Check before you turn up with one, particularly if it's damaged.
Batteries built into devices
If the battery is inside a device you're recycling anyway, leave it in place — don't try to prise it out. Licensed e-waste recyclers remove them under controlled conditions.
The exception: if the built-in battery is visibly swollen, say so when you book. It changes how the device is transported and handled, and it's important we know.
Vapes deserve a specific mention
Disposable vapes combine a lithium cell, a heating element and residual liquid in a sealed plastic body designed to be thrown away. They are among the worst things in the waste stream right now, and they end up in kerbside bins in enormous numbers.
They're e-waste. They belong at a battery or e-waste drop-off point, never in a bin.
Frequently asked questions
Can I put batteries in the yellow recycling bin?
No — that's worse than the red bin, because recycling facilities do more crushing and sorting. Neither bin.
Do you collect loose batteries?
Loose household batteries are best taken to a free supermarket or hardware drop-off — it's easier and costs nothing. Batteries built into devices come with the device.
What about my old car battery?
Lead-acid, different stream, and among the most successfully recycled products in the world. If we're taking the car, it's removed during depollution.
My laptop battery is swollen. Is it urgent?
Treat it seriously. Stop charging it, keep it somewhere cool and non-flammable, and get it to a proper drop-off point or tell us when you book.