Thanks. In the D4v2, the aux led locators use the cpu idle mode pulldowns (idr the exact name) so they use very little battery power, but the brightness isn't adjustable. The power switch backlight is the same way. Do you know of a current measurement or runtime test for the aux leds on the TS10?
Giving it a bit more thought I think I would choose the D3AA over this light, because of the 1.5V capability and wider choice of leds. I can live with the larger size. Thanks for the update about the USB batteries. That's unfortunate about the lanyard but maybe I can concoct something to add a lanyard without the clip. The D3AA has a bigger processor (32k flash, 4k ram) though I don't have a serious use for that at the moment. I have been thinking it could be interesting to have an interactive Forth interpreter in the light.
It had sounded to me like this new light had some other improvements over the regular TS10 but I'll look more closely.
All grocery stores around here have no eggs, I think due to H5N1.