mcjtom
35
Just want to add:
If one starts the HD12 on turbo and lets it run, the green light battery indicator turns red (for 5 s on turn) after about an hour (more or less coinciding with the second drop down), at 3.55 V.
The blinking red comes on (this time constantly, not only when turning the light on) a few minutes more than an hour and a half into the run, at 3.2 V.
The light will keep going fore another ~5 hours, until it shuts off when the battery voltage drops to 2.6 V.
Quite reliable runtime profile (with useful battery level indication scheme, once you figure out what it means) for a practical headlamp, I’d say.
Needs to be compared, but I think the F15 battery may deserve some credit. @PiercingTheDarkness: did you have a chance to use HD12 with F15 vs. the OEM?
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