Computer maker Fujitsu has said it is recalling 287,000 Sony laptop batteries because of a potential fire risk.
The withdrawal means that more than seven million laptops made by Toshiba, Lenovo, Dell, Sony and Apple have now been affected.
The recalls began in August with the first warnings that Sony's lithium-ion batteries could overheat or catch fire.
Analysts have said the battery exchange could affect up to 10 million computers and cost Sony as much as $500m (£265m).
