Man's close call as e-bike battery explodes moments after being thrown outside

A Sydney homeowner has had a close call with an explosive e-bike battery that erupted into flames just minutes after he threw it outside.

The second-hand e-bike caught alight at 2am today at a home in Guildford, in Sydney's west.

The bike was purchased by the homeowner just one day ago.

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The owner told FRNSW that he had placed the battery into the bike and noticed a small spark earlier in the evening.

He threw the battery into an outside courtyard as a precaution, where it exploded shortly after.

The battery was captured exploding on camera.

Firefighters managed to extinguish the blaze and submerged the battery into a tub of water to make sure it didn't reignite.

No one was harmed in the incident.

FRNSW said the incident is a reminder to never leave e-bike or e-scooter batteries charging inside around flammable material.