A woman talking on her mobile phone walks past an advertisement promoting Samsung Electronics' Galaxy Note 7 at company's headquarters in Seoul, South Korea, October 11, 2016. REUTERS/Kim Hong-Ji/File Photo - RTSS08V

(Reuters) - Safety standards for lithium-ion batteries need to be modernized following a massive recall of Samsung Electronics Co Ltd phones after faulty batteries caused fires, a U.S. government agency said on Tuesday.

“Consumers should never have to worry that a battery-powered device might put them, their family or their property at risk,” Consumer Product Safety Commission Chairman Elliot Kaye said in a statement.

The agency reached agreement with Samsung to recall 2.5 million Note 7 phones in early September. While most recalls have a “dangerously low” consumer response rate, 97 percent of Samsung’s Note 7 phones have been returned, Kaye said.

The U.S. consumer-safety regulator and Samsung are working with the industry to update the voluntary standard for lithium-ion batteries in smartphones, the commission said.

“At a minimum, industry needs to learn from this experience and improve consumer safety by putting more safeguards in place during the design and manufacturing stages to ensure that technologies run by lithium-ion batteries deliver their benefits without the serious safety risks,” Kaye said.