Contains the KL3 a relay?
- Thread starter BBL
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Longbow
Enlightened
Thats the sound of the light waves accelerating and breaking the sound barrior. 
ACMarina
Flashlight Enthusiast
HA!!
BrianChan
Newly Enlightened
My KL5 and KL3s do that. The 'click' will be softer as the battery voltage drops. My KL5 will click louder on a freshly charged 17670 compared to a partially used one. Obviously, it is most audible when used with 3 cells. When the light drops out of regulation there won't be any sound.
BrianChan
Newly Enlightened
Strange, I did the same with both heads (KL5 & KL3) on the Golden Dragon lantern's battery holder and the sound came from inside. Yup sparks can be seen when the head is not connected firmly onto the terminals, a wierd smell too! But the sound definitely came from inside the head. Just tried.
The KL3 only draws a bit of current. You can try the search function to find out the current draw.
The KL3 only draws a bit of current. You can try the search function to find out the current draw.
BrianChan
Newly Enlightened
Might be the regulation circuit starting up? You won't hear the click sound when the light drops out of regulation. A strange but useful way to find out whether your KL3 is still running in regulation or not is to put it next to your ear when turning it on. Why do I need to do this? Because I'm running mine on an unprotected 17670 and the point where it drops out of regulation is barely noticable visually, and I don't want to overdischarge the cell.
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