The safest way to charge an e-bike battery at home is to use the charger that came with the bike, charge on a hard, non-flammable surface away from exits and anything that can burn, stay nearby while it charges and unplug it once it's full. South Australia's Metropolitan Fire Service (MFS) and Country Fire Service (CFS) also say to have a working smoke alarm where batteries are kept, never build or modify a battery yourself, and never try to put out a lithium-ion battery fire: get out and call 000. This guide pulls together the official advice, with links to each source.
The short version: original charger only, charge on tiles or concrete, keep it away from doors, beds and couches, don't charge while you sleep or are out, unplug when full, and stop using any battery that's swollen, leaking, hot or smoking. If it catches fire, don't touch it. Leave and call 000. This is general safety information, not professional advice.
Why e-bike battery fires are a growing problem in SA
E-bikes run on large lithium-ion batteries, and when one fails it can overheat quickly, release toxic gas and burn very hot. According to a July 2025 release from Consumer and Business Services SA, MFS callouts to lithium-ion battery fires rose nearly tenfold over five years, with mobility devices such as e-bikes and e-scooters the leading cause. Of the 39 incidents the MFS and CFS attended across the state from January to June 2025, about one in four involved mobility devices, including house fires at Croydon Park, Hackham and in the Adelaide CBD.
None of this means e-bikes are unsafe to own. Most batteries never cause a problem. But the fires that do happen often start while a battery is charging indoors, which is why the official advice focuses so heavily on where and how you charge.
How to charge an e-bike battery safely
These tips come from the CBS SA release above, the MFS's lithium-ion batteries advice and the national consumer regulator, the ACCC:
- Use the right charger. CBS SA says to use compatible, compliant chargers and not to mix brands. The ACCC warns against "mixing and matching" chargers. Just because a plug fits doesn't mean it's the right charger.
- Pick the right spot. CBS SA advises charging e-bikes outside and away from combustible materials, not in hallways or near exits, on a hard, non-flammable surface such as tiles or concrete. A garage, carport or shed floor is usually better than a lounge room. If you live in an apartment and have to charge inside, keep it on a hard floor, well clear of beds, couches, carpet and your way out.
- Keep the exit clear. The MFS says to charge large-battery devices away from exits and entry points. If a battery does fail, you don't want it between you and the front door.
- Stay nearby and unplug when full. The MFS says to monitor batteries while they charge and unplug them once the indicator shows they're full. The ACCC suggests using a timer as a reminder. Fire and Rescue NSW's e-bike battery safety page goes further: don't charge batteries while you're asleep or not at home.
- Let it cool first. The ACCC recommends letting batteries cool after use and before charging, which matters after a long ride on a hot Adelaide afternoon.
A simple reminder to unplug
A smart plug with a timer or schedule can switch the charger off after a set time and remind you on your phone, which ties in with the ACCC's tip about using timers. It's a reminder, not a safety device: you should still charge only while you're home and awake, and only on a safe surface.
Handy reminder
TP-Link Tapo P110 Smart Plug
A compact Australian-plug smart socket from a big networking brand. You can set a timer or schedule in the Tapo app so the charger switches off after the time your battery normally takes to fill, and its energy monitoring shows when the power draw drops off, which is a good sign the charge has finished. Check that your charger's rating is within the plug's limits before you use it.
- Timers and schedules in a free app
- Energy monitoring shows when charging has tailed off
- Compact design
- Needs 2.4 GHz Wi-Fi and an app account
- Doesn't replace being home and awake while charging
Storing your e-bike and battery
- Cool, dry and out of the sun. The MFS and the ACCC both say to store batteries in a cool, dry place away from direct sunlight. Don't leave the bike baking in a hot car or against a west-facing wall through an SA summer.
- Away from living areas. The NSW Government's lithium-ion battery safety page suggests storing large batteries in a garage, shed or carport, away from living areas and from doorways or exits.
- Smoke alarm coverage. The MFS recommends a working smoke alarm in rooms where batteries are stored, and Fire and Rescue NSW suggests a working smoke or heat alarm wherever you charge or store them. If you charge in the garage, check whether your alarms actually cover it.
- Secure it too. Moving the bike to the garage or shed makes sense for fire safety, but make sure it's locked to something solid. Our e-bike lock guide covers locks that stand up to bolt cutters, and a GPS tracker can help if the worst happens.
Buying, servicing and modifying: what the fire services say
- Buy from reputable suppliers. CBS SA says to buy batteries and devices from reputable suppliers and follow the manufacturer's instructions. Replacement batteries and chargers should come from a reputable supplier or as the manufacturer directs, according to the MFS.
- Never build or modify a battery. The MFS and CBS SA both warn against building your own battery or battery pack, including linking batteries together. The NSW Government adds: never tamper with the motor, speed limiter or battery. A "de-restricted" bike is also not a legal e-bike in SA, as our guide to e-bike rules in South Australia explains.
- Be careful with second-hand. The NSW Government advises against using a second-hand battery because it could be damaged, modified or faulty, and suggests having a used e-bike checked by a professional.
- Look for approval marks. NSW now requires e-bikes, batteries and chargers sold there to be certified and carry an electrical safety approval mark, according to the NSW Government's new standards page. That law applies in NSW, not SA, but checking for those marks is a sensible test of a product wherever you live.
Warning signs: when to stop using a battery
CBS SA says to check batteries regularly for cracking, denting, swelling, leaking, overheating or smoke. The ACCC adds that you should immediately stop using any battery, product or charger that's overheating or showing signs of failure, and Fire and Rescue NSW lists water and fire exposure as reasons too. A battery that's been in a crash or a heavy drop deserves a check by an experienced e-bike mechanic before you charge it again.
If a battery is damaged but not hot or smoking, Fire and Rescue NSW suggests keeping it outdoors in a well-ventilated spot at least 3 metres from buildings and anything combustible until you can get rid of it.
What to do if a battery starts smoking or catches fire
Get out and call 000. The MFS says if a device or battery gives off gas or smoke, or catches fire, evacuate the area immediately, avoid breathing in the gases (which are highly toxic) and call Triple Zero (000). It also says never to touch, move or try to put out a lithium-ion battery fire, however small it seems, because of the risk of explosion and toxic vapours.
Disposing of an old e-bike battery in SA
Never put a lithium-ion battery in your household rubbish, recycling bin or hard waste collection, says the ACCC. In South Australia, the Local Government Association of SA announced in December 2025 that e-bike batteries can be dropped off free at four Adelaide sites: Campbelltown Works Depot, the Adelaide Waste and Recycling Centre at North Plympton, Heathfield Resource Recovery Centre and the NAWMA Resource Recovery Centre at Edinburgh North. Check Green Industries SA's batteries page for opening hours and accepted items before you go, or ask your local council.
FAQ
Is it safe to charge an e-bike battery inside?
The SA fire services' advice is to charge e-bikes outside where possible, away from combustible materials and exits, on a hard non-flammable surface. If you have no choice but to charge indoors, do it on a hard floor away from beds, couches and your exit, with a working smoke alarm nearby, only while you're home and awake, and unplug it when it's full.
Can I leave my e-bike charging overnight?
Fire and Rescue NSW and the NSW Government advise against charging while you're asleep or away from home, and the MFS says to monitor batteries while charging and unplug them once they're full. Charge in the evening while you're up and about instead.
Can I use a different charger if the plug fits?
No. CBS SA says to use compatible, compliant chargers and not mix brands, and Fire and Rescue NSW notes a matching plug doesn't make a charger compatible. If you lose or break the original, get a replacement from the bike's manufacturer or a supplier it approves.
Should I use a fire extinguisher on an e-bike battery fire?
The MFS says never to touch, move or try to put out a lithium-ion battery fire, however small. Get everyone out, avoid the smoke and call 000.
Where can I recycle an e-bike battery in Adelaide?
Free drop-off sites for e-bike batteries include Campbelltown Works Depot, the Adelaide Waste and Recycling Centre at North Plympton, Heathfield Resource Recovery Centre and the NAWMA site at Edinburgh North, according to the LGA of SA. Never put them in kerbside bins.