Electricity flow on iPhone 16 pro max while charging

The minimum current and voltage required for a human to feel an electric shock can vary depending on the person and conditions, but here’s a general breakdown:

• Minimum voltage: Around 50V AC or 60V DC is typically the threshold where most people start feeling a noticeable shock. Lower voltages can be felt if conditions like moisture or skin conductivity increase.
• Minimum current: As little as 1 mA (0.001A) of AC current can produce a tingling sensation.
  • 5 mA: Mild shock, still generally safe.
  • 10–20 mA: Painful, can cause muscle contraction.
  • 30 mA: Potentially dangerous — can cause difficulty breathing or heart issues.
  • 100 mA and above: Risk of severe injury or fatal electric shock.

Now, regarding Apple’s charging cables (like Lightning or USB-C):

• Voltage: Apple chargers typically provide 5V, 9V, or up to 20V for fast charging (like with USB-C Power Delivery).
• Current: Standard Lightning cables with a 5W charger supply 1A at 5V (so 5W). Fast chargers (like the 20W USB-C adapter) provide 3A at 5V or 2.22A at 9V. Higher-wattage chargers go up to 5A.

So the voltage from an Apple charging cable is too low to be felt as an electric shock under normal circumstances. Even the highest current provided by Apple’s fast chargers isn’t dangerous because the voltage is low, and low-voltage DC current generally doesn’t penetrate the skin easily.

That said, if there’s a damaged cable or faulty charger, things could get risky — but with Apple’s certified gear, that’s pretty rare. 

Search for accessories that have completed MFi certification. Once an accessory has completed MFi certification requirements and is reported to Apple as sold/distributed, it will be searchable in our public database of authorized Lightning, headset, charging, iAP-enabled, and Find My network-enabled accessories.

Learn how to identify counterfeit or uncertified Lightning-based accessories.

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