Last week, a Chinese woman was reportedly shocked to death when she answered a call on her iPhone 4 while it was charging.
Apple immediately said it would investigate what happened.
Apple also provided a comprehensive overview of which devices are compatible with which accessories.
Earlier reports of the accident said 23-year-old Ma Ailun was using an iPhone 5, but CCTV concluded that it was a stainless steel iPhone 4.
It also turned out that Ailun may have been using a third-party charger, instead of one made by Apple. But another theory is that the charger she was using was meant for use outside of China.
The investigation is still underway.
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