Recent content by DVDRW

Exciting thread. 8) I'm planning to do about the same. But DIY arduino tester controlled via PC software. Data logging to dropbox. Software will look something like this: Cells waiting: Heter Lifepo4 LG ABB41865 LG GBMG11865 MG1 LG ICR18650-HE2 LG MJ1 Panasonic 18650PF Panasonic NCR18650B...

Why not https://eu.nkon.nl/rechargeable/18650-size.html ?

Replaced the Dell vostro cells voltage still above 2v without disconnecting. Laptop shows not above 7% but still works full capacity charge/discharge 0-100%. NCR18650A cells. So yeah very sneaky chips they are. Other option are directly powering laptop to AC side with DIY battery and own BMS or...

How you implement LVC for car battery? Latching solenoid exist?

I have 787A+ Sometimes If i switch on the welder it welds very poorly. Strangely sometimes when i switch it off and on again then suddenly all welds doing ok. Max is 0.15 pure nickel or barely 0.2mm ni-plated steel. I use multiple layer 0.1mm pure nickel just to be sure. And solder extra copper...

~95% us use about 10 different cells max i think. I have ~20 different cells waiting for cycle testing over 2 years now. Start testing when i retire from work. So first test is like aging test running now :)

LG INR18650-M36 has 3600mAh label just for getting your attention. 3500mAh 35E etc have still bigger capacity in test results and are lighter in weight too! Fake 4K TVs and now THIS, cmon LG :evil: Cycle life is the most important parameter i think but strangely we still have so less...

What you are talking about? PF is 2.3€/qty and you have to buy 540pcs to get this price 29E is 2.14€/qty if you buy 200pcs. Shipping to Europe is always about 15€ even if you buy thousands of them. Tumich sells 29E ~2.10€/pcs inc shipping. Little bit cheaper but buying from Nkon store should be...

What about even cheaper Samsung INR18650-29E 2.14€/qty? As good as PF? https://i.imgur.com/4iKFhMc.png

NCR18650AU 4.9Ah 18650 cell https://www.youtube.com/watch?v=hcPwdBcXsrg :P

29E has this very rare LiNiCoO2 chemistry that never seen in 18650 cells. Very curious to know what cells wins cycle test. :)

Interesting, have to test this. But you cant go wrong with 25R cells? 2.35€ @ nkon :)

Very good 35E price (3.1€) right now from nkon https://eu.nkon.nl/rechargeable/18650-size/samsung-inr18650-35e.html Very curios about cycle life vs PF cell. In electric car, cycle life matters 7x more!

Safe connection? https://i.imgur.com/gV8Kxt8.jpg

Pure nickel strip confirmed! Worlds cheapest?