Here is my project/dream:
I already have permanently in my pocket:
- the most extreme mini cellular phone: HTC Tytn II (powered by a Li-Ion 1350mAh battery)
- the most extreme mini laser pointer: 125mW green (in metal tube and powered by 2xAAA batteries)
Now I would like to add to my pocket the most extreme flashlight.
My goal is to obtain the most extreme total output in the smallest size.
When I say extreme I mean that a LED(s) lifetime of at least 1-2 hours, a continuous and total runtime (for battery and heat) of at least 5 minutes and a temperature that doesn't hurt my hand are my only requirements. For the rest it must be the most extreme possible configuration available at any cost.
For the smallest size (it must be *always* in my pocket) I thought to share the battery of my cellular phone or of my laser so I thought to one of the following three options:
A) I power it with the Li-Ion 1350mAh battery of my cellular phone, attaching the LED(s) externally to the back plastic flat battery cover of my celluar phone
B) I power it with the 2xAAA batteries of my laser pointer, attaching the LED(s) to the metal cover of the batteries of my laser point
C) I cut the head of my laser with a saw, take new battery/ies with an higher voltage (choice: Li-Ion AA(s), RCR123s, 16500, 17500, 17670, 18500 or 18650 cell), and do the same as point B building a new case to host the different battery/ies, that are better to get the most out of the best LED(s) such the Rebel (100..), the Cree XR-E (Q5..) and the SSC Z (P4..)
I would start with the first problem: A, B or C? what do you think about them?