Cell phone batteries manufactured by leading companies Nokia and Motorola have failed latest safety tests, which show they are prone to explode under certain conditions, according to a US daily.
Chinese regulators in the southern Guangdong Province, one of the world's biggest electronics manufacturing centres, were quoted by the International Herald Tribune as saying that they had found Motorola and Nokia mobile phone batteries have failed safety tests and were prone to explode under certain conditions.
The batteries were said to be manufactured by Motorola and the Sanyo operation in Beijing, and were being distributed by companies based in the Guangdong Province, near Hong Kong, the paper reported.
But Motorola and Nokia -- two of the world's biggest mobile phone makers immediately denied links to the distributors of the problem batteries, suggesting that they were counterfeit, the report said.
"All the batteries tested were not Motorola genuine batteries. They were fakes," Yang Boning, a spokesman for the company in Beijing, was quoting as saying.
"Those companies are not our suppliers," Boning added.
Nokia executives, the Tribune reported, were investigating the case and trying to determine whether any of the substandard batteries affected Nokia phones.
They said they did not manufacture batteries in China and that the company had no business ties with the Chinese distributors named in the safety tests.