FENZ have issued a warning regarding the dangers of lithium-ion batteries days after a harmful explosion.

On Saturday, an e-scooter charging in a central Wellington apartment exploded- leaving a person critically injured.

Fire and Emergency NZ risk reduction and investigations manager Pete Gallagher says it's important to be careful when charging lithium-ion batteries- and avoid doing it overnight.

"One of the problems with lithium-ion batteries is they don't like being over-charged as much as they like being run totally flat and recharged from 0. Once the battery's full of charge, that's when you take it off."

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