A Sony-made battery used in a Fujitsu laptop computer overheated and emitted sparks, Fujitsu said Friday, amid a massive global recall involving Sony batteries. A Fujitsu worker was visiting a customer’s home to retrieve the laptop as part of the company’s recall of Sony batteries when it overheated and started giving off sparks, according to Fujitsu spokesman Toshiaki Koike. No one was injured in the incident, which is under investigation. Fujitsu is recalling more than 280,000 lithium-ion laptop batteries made by Sony because they pose a risk of overheating and bursting into flames.