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SOB 1000 + 4D Maglite + Seoul P4 = Questions

JamisonM

Enlightened
Joined
Apr 26, 2006
Messages
750
Location
South Carolina
I've got a 4D maglite that's sitting right in front of me waiting to modded. I've already got the switch cut down and all that I need now are a heatsink, emitter and driver. I want long running, but very bright light. So, I figure running a P4 and 1A should be bright enough and for battery life, 4 D cells should provide plenty of power. Beyond this basic understanding, I've got a few questions.
Since the SOB has a minimum input voltage of around 3V, is it safe to say that I will be able to squeeze just about all the power I can out of the 4 D cells powering this light? Energizer says their D cells are dead at .8v and with 4 D cells in a series, that's still 3.2V. So, with a P4 with a forward voltage of 3-3.5v, there will still be light even with dead batteries? Will I still be able to get a an amp out of the batteries when they're at such a low voltage?
 
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