Phlogiston
Enlightened
The light wont drain the battery below 2.8V
Actually, it will.
The one I tested went right down to 2.4V before I decided enough was enough. You can read the details here. I can even turn it on and off at 2.5V; it still manages to just barely power up.
In addition, the circuitry still draws a trickle of power from the cell even when the microcontroller can't turn on. The light can look completely dead even as it slowly finishes killing your unprotected cell. I always use protected cells in these lights.
I've just received three S2+ with the new firmware/driver, and it is a fantastic upgrade from the original S2+ !
I don't have one in hand, so this is based on my understanding of the stock Biscotti firmware, but I believe one of the upgrades is a full low voltage cut-off at 2.8V. However, the light will step down to progressively lower modes as power drops, so we should still get some warning beforehand, unless the light was already in the lowest mode.
That's one of the reasons I enable moonlight mode in my lights with this behaviour - I never use moonlight mode, so the light always has something left to drop down to from the lowest mode I do use. Nice if I've forgotten to take my charger on a trip and I'm trying to eke out my cells as far as I can!
I've settled on mode group 2 (0.1,1,10,35,100%) and no memory for the time being. Once the new firmware is officially released in stock S2+, I'll post a review.
I really like the look of mode group 10 (1%, 10%, 35%, 100%) for the 7135*3 or 4 configurations I use.
I'll look forward to reading your review when the time comes When you post your review thread, could you post a link to it in this thread as well, please?