MFRS has not confirmed what the battery was being used for, but they are often found in e-bikes and e-scooters.
The fire service said there had been 150 fires linked to lithium-ion batteries on Merseyside between April 2023 and August 2026, and five fatalities linked to the batteries.
Johnson said: “We’re urging people to follow the manufacturer’s instructions – only using batteries and chargers which have been supplied with the vehicle or approved by the manufacturer, as anything else can pose a huge fire risk.
“It’s also important to know and recognise the signs that your lithium-ion battery may be failing – if it is swelling, making unusual sounds, has a strong smell, is failing to charge, or is smoking, please stop using immediately.”
Paying tribute, Ms Brabin’s relatives said she was a “devoted and loving mother who lived for her children”.
They said the family had been left “heartbroken” and their “unimaginable” loss would be “felt forever”.
They also said “our beautiful babies, Leo, Ellis and Prudence, were loved beyond measure” and they were “devastated by the loss of Elisha, Leo, Ellis and Prudence”.
“They have all been taken from us far too soon,” they added.
Listen to the best of BBC Radio Merseyside on Sounds and follow BBC Merseyside on Facebook, external, X, external, and Instagram, external. You can also send story ideas via Whatsapp to 0808 100 2230.