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MASSIVE restock of EV Batteries at 5% coupon "POWERWALLS"
  1. Batteriapan

    DIYBMS v4 thoughts

    I'm interested in this too. Perhaps a joint order?
  2. Batteriapan

    Li-ion awarded the Nobel prize in chemistry

    John B. Goodenough, Stanely Whittingham and Akira Yoshino is awarded the Nobel prize in chemistry 2019 for inventing the li-ion battery.
  3. Batteriapan

    My INR18650-29E drops to 4.12V after a full charge

    I have this collection of 40Samsung INR18650-29E thatbehave strange according to me. After charging them to 4.2V they drop to 4.15V in a matter of minutes. After a few hours they drop top 4.12V and seem to stay stable there "forever" (only had them for so many weeks). If I recharge a 4.12V cell...
  4. Batteriapan

    Sliding cell holder

    :C I suppose I'll keep searching for a while more before ordering a bunch of chargers I'll have to take apart. Thanks for the replies!
  5. Batteriapan

    Sliding cell holder

    I'm sick of the crappy springy cell holders you find everywhere. Want to get a bunch of the kind usually found on cell testing devices. What are they called or where can I get them? I.e. not these: Nor these: But the kind found on this:
  6. Batteriapan

    Considering 8s rather than 7s

    If I right, then keeping my packs between 3.2V and 3.9Vgives me about ten percentage point less capacitycompared to3.2V and 4.0Vbut two to four times the longevity of life. Sounds like apretty good deal to me. Given I have enough cells to handle the capacity loss and...
  7. Batteriapan

    SBMS on Kickstarter, 3 days to go

    Just received my SBMS120. I'll post a videoreview when I get around to installing it. Early december?
  8. Batteriapan

    SBMS on Kickstarter, 3 days to go

    Just a few days until shipping! So looking forward to trying out my SBMS120. It's way overkill for my needs :D.
  9. Batteriapan

    Ham & CB Radio enthusiasts

    I do 11m dxpeditions during the summer. Enjoy climbing rocky knolls in the Swedish west coast archipelagos, bringing a small QRP rig and a simple dipole. Almost always great conditions to somewhere in the Brittish isles, but have over the years been getting QSOs with pretty much everything but...
  10. Batteriapan

    Panasonic NCR18650BE Cell Specifications

    I've posted a couple of images in requested thread. Btw, the capacity I've measured on brand new cells when charging to 4.2v, waiting 24 hours and then discharging at 500mA to 3v is 3326mAh, 3184mAh, 3180mAh, 3176mAh and 3165mAh.
  11. Batteriapan

    Processed Submissions and Updates

    Photos of the Panasonic NCR 18650BE cell as requested in Flashless Note: Added pictures, thanks!
  12. Batteriapan

    Circuit with variable cutoff voltage?

    Hi all! I'm looking for a charger circuit with variable over charge cutoff voltage, alternatively one set to 3.8v cutoff. Anyone aware of such a thing? I'll be charging very small cells with this, say 500mAh or so, to be used as UPS for up to an hour or sowith small WiFi-routers. Something...
  13. Batteriapan

    Fuse wire

    Don't trust wire specs, test it. I've ordered multiple wires from China that turned out to be quite different than what they promised.
  14. Batteriapan

    What do you do for a living?

    Freelance software developer. Do a lot of my own projects too, but they're generally economic disasters compared to working for the man. :D Open source, open data. Machine learning and information retrieval. Geography. I suppose you could put me in the "big data" box, if that helps, although...
  15. Batteriapan

    What are you paying for your cells?

    Try talking with them, they might be OK with it if you ask. Nothing to lose by trying.
  16. Batteriapan

    Specific fusewire

    Not sure, but I suppose 0.15mm, i.e. 3A without energy loss. If you have a too weak fuse wire anda single cell dies and draw 100% from the other cells, then you'll burn the fuse ofthe good cells too. The smaller the pack the weaker the fuse wire I've used. For this small 8p that I only draw...
  17. Batteriapan

    Specific fusewire

    I've bought mine here:
  18. Batteriapan

    TP4056 question

    APD Thanks a whole bunchfor testing and getting back to me on that! I just ordered a bunch of those that you use. The third batch from CZisa charm...
  19. Batteriapan

    TP4056 question

    I think you might misunderstand. I can draw current on the output with only battery connected, but not if I never sent a current on the input. if I pick up a circuit that's not connected to anything on any terminal andconnect it to a battery, then I get no currenton the output terminals. I need...
  20. Batteriapan

    TP4056 question

    Sort of off topic, but I can't think of a better forum to ask this question. I've been using the more recent TP4056 based circuit boardswith power out terminals as a smallUPS for my WiFi-router. That kind. The problem is that it will not give away any power on the load terminalswhen...