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Question:

Buy a few flashlight LED lamp, directly connected to the 5V electric heating lamp why. How to solve?.

Buy a few flashlight LED lamp, directly connected to the 5V electric heating lamp why. How to solve?.

Answer:

Not limiting directly connected to the 5V, has been lucky not to burn
The general electric LED lamp with voltage does not exceed 4.2V, because 18650 of the full battery voltage is 4.2V, voltage to 3.8V protection to prevent the excessive discharge of the battery. The heating lamp is normal, the more heat generating power is also bright brightness. So the LED lamp equipped with aluminum substrate and the copper circuit warehouse to heat.
Look at how much the lamp rated current, and the current limiting measures, the working voltage of 3.2V lamp. Do you answer the phone charger directly?

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