jar3ds said:
hows the battery life? Any access to relative runtime graphs? I wonder how much current is going to the LED.... Is the Tikka XP just a Lux1?
Again: can you get access to the LED?
[font="]From the picture that Cave Dave posted it looks like the LED can be accessed through the Brown and Red wires.. I have not done this.. I do not know what LED the Tikka XP uses.
[/font] The 4 x 2/3 AAA NiMh batteries are rated at 350mah .
After full charge the voltage and current draw at the battery is as follows:
High 5.1V @ 270ma = 1.377 w
Med 5.26V @ 148 ma = 0.78w
Low 5.28V @ 56 ma = 0.3 w
Boost 4.8v 1.6A = 7.68 w
I set my power supply to 3.6vdc to simulate using 3 x NiMh Rechargeables and found the voltage and current draw to be:
High 100 ma = 0.36w
Med 50 ma = 0.18w
Low 25 ma = 0.09w
I have not done an exhaustive run time test and do not have any access to relative runtime graphs.. I have been running it on our evening walk over the past month or so and have found the Medium Diffused setting to be just right for brightness. This gives ~2+ hours of run time before it automatically drops to Low... Boost mode is amazing for such a small light.. I am counting on the Temp sensor to prevent damage to the LED.. Time will tell.
The Tikka XP demands too much current from Alkaline AAA's for a reasonable discharge curve . 3 x Rechargeable AAA's give a flat discharge curve but the light output was disappointing.. Lithium AAA's seem OK but they are expensive. The 4 x 2/3 AAA Mod has turned this light around for me. It's light weight, compactness, hands free use and great diffuser have made this one of my all time favorite "truly useful" lights.