Quote:
Originally Posted by 5.56
To save people from wasting their LED lights, my Pentagon L3 LED flashlight had a premature failure because of these 3.7 v batteries.
So, LED lights do fail under higher voltages!
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If they use a single battery, it is probable that there is no regulator as a typical white LED will run off 2.8 to 3.4v. A sign that the LED is overpowered is that the light color will start to turn purple... and turn red a fraction of second before burning... learned one day I had nothing to do but plugging LEDs on a variable PSU...
For 2 batteries ones, the voltage HAS to be regulated down whatever it is, usually by a switching regulator. If you use theses 3.7v batteries and notice the flashlight becomes hot, it is probably because it uses a linear regulator... discontinue use, it will burn.