This article refers to KidWind Power Output Pack (KW-POP)

The KidWind Power Output Pack (KW-POP) no longer contains 10 mm LEDs. When those LEDs were included, no, the 10 mm LEDs were not resistor protected.

Since 2020, the KidWind Power Output Pack has shipped with a small circuit board containing 4 surface-mount LEDs. These LEDs are resistor protected. You can find more information at KidWind LED Board Troubleshooting and FAQs

Background:

LEDs typically need a resistor to prevent damage from current that is too high. Optimal current for 3, 5, and 10 mm LEDs is usually 20 mA. Going over that can cause the LED to fail.

This is not typically an issue with KidWind wind turbines, which is the intended purpose of the power pack. If you are using these LEDs with another application that supplies more current, it is a good practice to put a current-limiting resistor in series with the LED.

KidWind Troubleshooting and FAQs