The Anker European Travel Plug Adapter shouldn't overheat when charging multiple devices if used correctly. It's designed for dual voltage (110-240V) devices, so keep in mind it doesn't convert voltage. The manufacturer clearly states, 'This is not a voltage converter,' so if your device only supports a single voltage like 110V, you'll need a separate converter to avoid damage.

This adapter is perfect for dual voltage devices, especially when traveling in Europe with Type E/F sockets in places like France, Germany, and Spain.

Our research shows that folks find it handy for giving multiple charging ports while fitting well into European sockets. Even though it doesn't change voltage, it does its job of charging devices well.

As for overheating, most users haven't reported significant heat issues as long as they stick to the adapter’s capacity. Just be sure not to overload it.

In essence, it's a solid choice for your dual-voltage devices, but always double-check your device's voltage and the adapter's limits for safe use.