Thread: awesome led lenser copy

Originally Posted by gadgetman

D ....................
You may want to add some heat sink compound/silicon grease to the back of the board when you put it back together.

Good point, I will do that.

I did some Googling on the Cree operating voltage and it seemed to be 3 to 3.7 v. This caused me to check the power they were getting and I attached a multimeter to the cable connecting to the PCB and found I was getting 4.06v.. I had anticipated that the two 18650 Li-ion batteries in parallel would have been reduced to 3.7v by the "system," but no. I imagine I am going to burn out the emitters well before their stated life and that the excess heat generated as a result of the high voltage would have contributed to the emitter detaching.

I may try leaving the batteries, which are being charged in their correct charge unit, for a few week or so after charging to see if the voltage drops down to an acceptable level. Not sure why if they are rated at 3.7v they end up at 4.06v. shudder.

Is this an action you follow?