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  1. idleprocess

    Dakota lithium ion rechargable batteries

    Yup. LFP SLA replacements. Peak current ratings are disappointing, otherwise I would have tried out some for UPSs.
  2. idleprocess

    Any other power source for a Streamlight weapon mounted light than than 123's or the proprietary "18650"?

    Positive contact will tend to be either recessed within an insulator such that flat contacts (such as the typical alkaline/NiMH/123A negative) won't 'make'. No, they're independent of one another.
  3. idleprocess

    Any other power source for a Streamlight weapon mounted light than than 123's or the proprietary "18650"?

    A quick search hasn't turned up anything on the voltage range and thus whether or not it has low voltage protection for bare cells. At some point every LED driver cuts out - the question is whether or not it does to at a voltage that's above the overdischarge limit for li-ion. I've also not...
  4. idleprocess

    What is the next big thig in LED technology?

    Assuming a mere 30% loss of output from optics + other factors your 500 net lumens takes about 715 gross lumens. If your LED is 200 lm/W that's 3.575 watts; if it's a more realistic 150 lm/W that's 4.77 which we'll just call 4.8W. So for 10 hours you'll need 48Wh of energy. You're probably...
  5. idleprocess

    What is the next big thig in LED technology?

    High-CRI/color accuracy LEDs aren't especially difficult to source at the component level, however they're a bit more difficult to specify in end products. 90 CRI LED light bulbs in the A19 formfactor can be had - either on the shelf at hardware stores or from online retailers. Too much? Too...
  6. idleprocess

    Looking for a bare bones featureless taclight can't find anything plz halp?

    Surefire G2X tactical is close to what you're looking for.
  7. idleprocess

    darkest place you have ever been?

    It's a sensation I re-learn with decreasing frequency due to the realities of adulthood, but whenever I feel it I imagine it's like when I was a child and we'd let the family cat outside: after a few seconds of scanning it would visibly relax as if it was back in its element and had fundamental...
  8. idleprocess

    darkest place you have ever been?

    I learned to appreciate my night vision both romping around at night as a kid and on camping trips. Under a surprising range of conditions it's possible to navigate over clear terrain with ease and you can see more, further without a light source to snap shut the rods and largely reduce you...
  9. idleprocess

    darkest place you have ever been?

    Boundary Waters Canoe Area Wilderness on an overcast night, in the woods.
  10. idleprocess

    What was your prep for today?

    It's not my main plan either. However there are numerous plausible scenarios where I might not have the choice. Ideally in any of those scenarios I've got at least day of warning that I need to leave - ideally days of warning - to pack up the vehicle and vacate the region and the BOB is merely...
  11. idleprocess

    What was your prep for today?

    Pulled the bugout bag and conducted inventory. Not as heavy as I thought (with 2.8L of bottled water no less) at 32lb - sans some things that won't be going back - but still needs some re-engineering: The survival rations had just expired (since replaced) The bottled water had long expired...
  12. idleprocess

    Red light better for night vision - any difference in LED vs. incandescent?

    On modern cars I find myself doing the following: City driving: minimum setting +1 Country driving: minimum setting
  13. idleprocess

    Are computer screen backlights upgradeable?

    Assuming this spec sheet is correct... ...the backlight is LED. Upgrading the backlight Might™ be as simple as finding comparable superior SMD LEDs and swapping them out. But expect the process to be a high-risk surgery - possibly including replacement of resistors and/or other power/control...
  14. idleprocess

    Any other power source for a Streamlight weapon mounted light than than 123's or the proprietary "18650"?

    So, per the documentation... Since it works with 123As or an 18650 that means the contacts are a conventional tubular light - positive at one end, negative at the other. Also, since it works with both ~6V and ~3.6V, there's almost certainly no interaction between the driver and any circuitry...
  15. idleprocess

    Beware Alkaline Cells

    The quality of alkaline cells seems to have declined over the last ~20 years. Likely a consequence of the rise of NiMH and the slow displacement of the swapable cell by the integrated Li-ion cell recharged via USB. Cost. Alkaline cells are cheap and made by numerous parties. Li primary...
  16. idleprocess

    Are these batteries protected or not.

    Why does anyone need a D4 with 4300 OTF lumens? Or one of the bug-eyed Acebeam lights that can push something close to 100,000 lumens? They don't. But the products exist and are capable of these things, usually for brief periods, but otherwise spend the bulk of their working lives putting out...
  17. idleprocess

    Selecting Cordless Electric Power Tools

    All other things being equal, higher voltages mean less current to do the same amount of work that demands more current from lower voltage. Less current is easier on cells and power electronics and Should™ result in longer battery pack runtime and lifespanes. But all other things are not equal...
  18. idleprocess

    Are these batteries protected or not.

    I'll try to deliver a quick primer. Batteries of the same specific chemistry can be compared using capacity (mAH / AH) and discharge rates (often expressed as C or mA / A). Most li-ion cells register 4.2V fully charged. 3.0V empty and have a 3.6V or 3.7V nominal voltage under load. The cells...
  19. idleprocess

    Are these batteries protected or not.

    With a rated capacity of 900mAh and a maximum discharge of 1C (900mA) I'm not sure these cells will satisfy in the FWAA. A quick search suggests that 3A - or even 10A - cells are recommended. 3A would be a nominal 10.8W or approximately 111 lm/W net efficiency for its peak claimed 12000 lumens...
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