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

John B. Goodenough, Stanely Whittingham and Akira Yoshino is awarded the Nobel prize in chemistry 2019 for inventing the li-ion battery. https://www.nobelprize.org/prizes/chemistry/2019/summary/

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...

: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!

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:

If I getbatteryuniversity.com 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...

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

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

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...

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.

Photos of the Panasonic NCR 18650BE cell as requested inhttp://secondlifestorage.com/showthread.php?tid=1735 Flashless Note: Added pictures, thanks!

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...

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.

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...

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

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...

I've bought mine here: http://www.ebay.com/itm/112028568439

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...

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...

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...