A 25‑year‑old man, Lachie Perrem, was left fighting for his life after his robot vacuum suddenly exploded inside his home, leaving him with burns to 75% of his body and sparking a devastating fire.
He was rushed to Fiona Stanley Hospital and has since undergone numerous surgeries.
The damage extended from the kitchen into the living room, with furniture destroyed, floorboards charred and debris spread throughout the home.
His mother, Fiona Perrem, has now shared more facts surrounding what occurred.
She said: “He had a robo vac and unbeknownst to him the battery leaked. When he started cooking, something ignited and caused an explosion. He was at the forefront of it all.”
The appliance has been sent to the state’s Building and Energy Office for further analysis.
The Department of Fire and Emergency Services Western Australia said lithium-ion batteries, which are typically used in robot vacuum cleaners, can be extremely dangerous.
A spokesperson said: “When lithium-ion batteries fail, they can undergo thermal runaway, which can be violent bursting of one or multiple battery cells, hissing and release of toxic, flammable and explosive gases and an intense, self-sustaining fire.
“Thermal runaway in lithium-ion batteries can happen very quickly and be very dangerous. It may cause toxic smoke, flames and battery pieces to explode.”
Mr Perrem has already undergone three surgeries as a result of the blast, including wound debridement and skin grafts to his fingers, left elbow and torso. He also temporarily lost his voice, with more surgeries anticipated in the coming months.
On July 20, Ms Perrem added an update to the GoFundMe page which read: ” Another positive update on Lachie’s recovery.
“His grafts are healing well, and the physio team is extremely happy with his progress, especially with the movement in his hands.
“Today was another big milestone as his feeding tube was removed.
“His face and neck are healing really well too. Every step forward is a huge achievement, and we’re so grateful for the incredible care he’s receiving and for everyone’s ongoing support, encouragement and donations.
“Thank you all for continuing to stand by Lachie and our family as he continues his recovery.”
When you look at scenes like blown‑out windows and blackened walls, it’s difficult not to think that some everyday appliances and vehicles ought to come with far clearer warnings.
The modern world is full of kit that’s powerful, complicated, and sometimes temperamental, yet the safety guidance is constantly buried in tiny print or written like it’s meant for a courtroom rather than a real person trying to keep their home safe.
The way lithium‑ion batteries are spoken about can make it sound as if one device is a ticking bomb while another is magically safe, when in fact the difference isn’t the chemistry… it’s the engineering, the scale, and the safety systems wrapped around it.
Lithium‑ion batteries — whether in a robot vacuum, an e‑bike, a phone, or an electric car — all carry the same underlying dangers: overheating, thermal runaway, fire. But the level of protection built around them changes massively.
When you hear about fires from e‑bike batteries, scooters, robot vacuums, or cheap chargers, it’s natural to think “just ban the lot.” But the truth is more complex, and the danger isn’t the lithium‑ion chemistry itself… It’s the quality, the design, and the safety systems wrapped around it.
Lithium‑ion batteries aren’t inherently dangerous. Badly‑made lithium‑ion batteries are unsafe. That’s the fundamental difference.
So what should be banned?
Not the chemistry — but the dangerous versions of it.
- Unregulated imports — Cheap, uncertified batteries sold online.
- Counterfeit chargers — These cause a huge number of fires.
- Devices with no proper BMS — A battery without a good management system is a fire hazard waiting to happen.
And when a report or a safety notice fails to identify the make and model, it becomes virtually useless. It’s like saying, “A car exploded somewhere in Britain,” and then expecting people to learn something significant from it. Without specifics, there’s no way for anyone to evaluate risk, check their own devices, or understand what really went wrong.
THE MONTHLY MOSQUITO 