Recent content by Wrend

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  1. Wrend

    When do you retire old AA/AAA batteries?

    They're rated down to 80% remaining capacity. At this point they tend to degrade exponentially, but yes, if they still work for you, then they still work. I still have all my Eneloops from 10+ years of buying them and haven't bothered testing their capacity very accurately as they still all hold...
  2. Wrend

    Best 14500 cells

    Not sure if I should bump this thread or start a new one, but here I am... Been a while since I've been on the forums. I have a few devices that'll take the higher voltage of 14500 li-ion cells as well as AAs. I just got some generic Chinese ones from Amazon that work, but likely aren't the...
  3. Wrend

    Motor Pulley ratio

    Maybe... What percentage is that of the base/normal RPM you're getting now?
  4. Wrend

    [Lifehacker article] How often should you fully discharge?

    Good point. I wasn't thinking that these internal charger circuits and/or devices might be measuring and tracking current rates too. I suppose some of the "smarter" ones probably do these days.
  5. Wrend

    [Lifehacker article] Simple/cheap way to cut off charging at 80% of battery?

    So that you're left with a total of 30% of the capacity of a cell to use per cycle? Sorry, but that isn't a practical nor realistic goal just to try and maximize cycle life and cumulative lifetime capacity potential. Now, if you had exceedingly excessive capacity to work with, and were doing...
  6. Wrend

    [Lifehacker article] How often should you fully discharge?

    From what I understand, the only reason someone might want to fully discharge Li-Ion and Li-Po type cells (hopefully ones not in series) is to maybe recalibrate battery meters. Not exactly sure why, but I've heard this rationale. Seems as though they should be able to measure this based on...
  7. Wrend

    Is Energizer trying to kill rechargeable batteries? They're sure trying.

    Actually, they can work fairly well for many of these devices too. They may just need to get changed out for charged cells a little sooner than these devices would go through alkaline cells. With the regular Eneloops, you're talking about roughly 2/3 run time compared to alkaline cells, and with...
  8. Wrend

    Which currently available Eneloop battery do you prefer, and why?

    Not sure if you were asking me or not, or if it was just a general question, but I've mostly been using a couple C9000s. When I first got some Eneloop cells, I was primarily using a "dumb" wall wart style slow charger. On the C9000s, I charge the Eneloop AAs at 700mA, and the AAAs at 300mA. I...
  9. Wrend

    Which currently available Eneloop battery do you prefer, and why?

    Regular current generation/available Eneloops, AA and AAA. Reasons: Cost for capacity per charge and cumulative lifetime capacity potential including good performance, sustained usability, and low self-discharge. All my Eneloops are still performing in the "like new" range, including the first...
  10. Wrend

    Small Portable Radio's?

    Yeah, if I remember it's something like 0.5/1.5 watts, so probably only a realistic range of maybe up to 1 to 2 miles. These UHF radios are also more clear line-of-site dependent, their advantage being that these frequencies are relatively free and available to use by anyone (FRS). I would...
  11. Wrend

    Small Portable Radio's?

    Hey, guys. Thought I might as well chime in here. I'm thinking about picking up a couple Motorola Talkabout MR355R 2-way radios. They're FRS, GMRS, and GMRS repeater channel capable radios. They also have, off the top of my head, I think 11 NOAA type channels for emergency and weather related...
  12. Wrend

    Is Energizer trying to kill rechargeable batteries? They're sure trying.

    OK, I misunderstood what you meant, then. Yes, at a constant voltage and a constant resistance you should have a constant current. I was just pointing out that both the voltage source and the resistance of the circuit determine how much current the given voltage can push through. And of course...
  13. Wrend

    Best rechargeable d cell batteries?

    I could get plenty of current from a pack I made. For some of the ones I have for various hobby related stuff, we're talking 100s of amps. Anyway, my point was that actually true D sized cells should theoretically have much higher capacities than what they do, much higher than 8000mAh for LSD...
  14. Wrend

    Best rechargeable d cell batteries?

    Funny thing though is that true D cells should have significantly higher capacity than 4 parallel AAs, given the same chemistry type and proportionally similar cell construction practices. I'm guessing that it's just standard practice to skimp on material and construction costs for C and D...
  15. Wrend

    Is Energizer trying to kill rechargeable batteries? They're sure trying.

    I agree that NiMH cells should be more than fine in general as a replacement for alkaline cells, but I just wanted to point out that the performance and electrochemical characteristics of a battery can very much effect the current that it is pushing through a circuit. Current (in a basic...
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