Amazon E-Bike Battery Explosion Lawsuit Claims Fire Caused Severe Burns Across Man’s Body

Lawsuit indicates manufacturers failed to conduct proper testing before making the e-bike available for sale on the popular shopping website.

A Florida man has filed a product liability lawsuit alleging a battery from a Bigniu electric bike sold by Amazon burst into flames while charging, causing severe burn injuries.

The complaint (PDF) was brought by Saul Santiago Hernandez in Florida Circuit Court last month, naming Amazon.com Inc. and Bigniu Technology Inc. as defendants. The case was removed to the U.S. District Court for the District of Florida on June 1.

Hernandez alleges the Bigniu e-bike’s lithium-ion battery was defectively designed and that Amazon and Bigniu were negligent in allowing the product to be sold on the U.S. market.

Lithium-Ion Battery Fire Risks

Lithium-ion batteries have been linked to overheating and thermal runaway reactions in e-bikes and numerous other products in recent years. These incidents have led to fires, property damage, injuries and even deaths.

Thermal runaway occurs when a battery cell overheats and triggers a self-sustaining chain reaction, causing the temperature to rapidly increase. This process can lead to the battery catching fire or even exploding, particularly when multiple cells are involved.

The risks of thermal runaway are particularly high with low-quality lithium-ion products, which may use substandard materials or lack rigorous safety testing. These defects increase the likelihood of fires, explosions and severe injuries, which have resulted in numerous recalls and lawsuits.

Last month, a wrongful death lawsuit was filed in Alabama, where the plaintiff claims that the battery from a Rad Power e-bike caught fire while charging, causing a blaze that injured a woman and killed her husband. Rad Power e-bikes had previously been recalled by the U.S. Consumer Product Safety Commission (CPSC) in November 2025, following at least 30 fires and $700,000 in property damage.

Amazon E-Bike Battery Fire Allegations

This recent Amazon e-bike lawsuit indicates Hernandez purchased a Bigniu BG10 electric bike on May 10, 2024, through the popular retail website. On July 25, 2024, while charging the e-bike at his home in Boca Raton, Florida, the battery allegedly exploded, setting both Hernandez and the room on fire.

Hernandez required immediate medical attention and suffered serious and permanent burns and other injuries to his body.

The complaint alleges the defective design rendered the bike unreasonably dangerous for normal use. It also claims Bigniu and Amazon failed to properly test the battery before placing it on the market for sale and did not warn consumers of the potential risks.

“Defendant, Amazon, owed a duty to adequately test, inspect, monitor, and assure the quality of the subject E-Bike before placing the subject E-Bike into the stream of commerce.”

— Saul Santiago Hernandez v. Amazon.com Inc. et al.

The complaint raises allegations of strict liability, negligence, and breach of implied warranty of merchantability against both Amazon and Bigniu. Hernandez is seeking compensation for past and future medical expenses, pain and suffering, loss of capacity to lead and enjoy normal life, mental and physical anguish, physical impairment and loss of income.

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