A mobile phone business faces prosecution over the death of a woman electrocuted by a faulty USB phone charger at her home on the NSW central coast.

Mother-of-two Sheryl Anne Aldeguer was found dead while wearing headphones inside an East Gosford home with burns on her ears and chest after a faulty charger sent a high current through her body, according to Fair Trading NSW.

A Filipino national, Ms Aldeguer was found dead by friends on April 23.

It is believed a dodgy $4.95 phone charger sent a high-voltage electrical pulse into her phone, which transferred to the earphones she had connected to a laptop.