Chances are if you use a mobile phone equipped with a camera, it's powered by a Sanyo battery.

Osaka-based home appliance manufacturer Sanyo Electric Co. is one of the world's largest battery manufacturers, accounting for nearly half of those in all mobile phones.

"We have been building up our market position for about 40 years," said Fumitoshi Terashima, general manager of mobile energy in Sanyo Electric's component group.