Errr what?

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Nov 20, 2019
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That feeling when your RC3563 battery tester arrives and the manual is in Chinese!
 

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floydR

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Aug 23, 2017
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I understand the manual I got for my YR1030+ was in Chinese. I learned some tips on it's functions reading other peoples comments about it here, also by just using the meter. i believe I eventually found an English version online.

Later floyd
 
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I used Google Translate on my phone to change the language to English in the settings and to have a quick scan through the manual.
Doesn't tell you actually how to use it which I found quite strange but what was interesting is that it said most new 18650s have an IR of 30-60.
 

floydR

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Sounds right there are a few with lower IR I have a few with 18-19mOhms but the ones going into my powerwall are in the 304 34-39 mOhm range.

Later floyd
 
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OffGridInTheCity

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Dec 15, 2018
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in the 304-39 mOhm range.
304? Yikes - don't you trouble with those cells?.

I use OPUS (which is very off) but in general I accept up to 80'ish OPUS speak and most are 30-60 OPUS wise - which means 15-40'ish? per OPUS over measurement discussed in a thread yesterday.

I had a set of packs built with Green Sony G5/G7(s) that measured 200-300 OPUS wise - and they were a disaster and would not play well with the other cells. Their voltage ranges were *way* out of wack during the charge/discharge curve compared to the other packs.

As an FYI reminder - @Wolf has extensive info on this and a huge database of proper IR for a wide variety of cells. He has proven that strict attention to good IR will result in more easily managed set of packs :)
 

daromer

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Do note that the opus can show easily 100%off or more depending on the contact surface. i have shown in a video where the same cell can show 50 or even 150 ;)
 

Wolf

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Sep 25, 2018
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I used Google Translate on my phone to change the language to English in the settings and to have a quick scan through the manual.
Doesn't tell you actually how to use it which I found quite strange but what was interesting is that it said most new 18650s have an IR of 30-60.
The use of the meter is not that hard if you got the holder with it then just turn on the meter, I believe Auto settings are the default, insert cell into the holder and read voltage and IR.
ICR, NCR & CGR chemistry (low drain) batteries that are good will have an IR between 35mΩ to 65mΩ with 65mΩ stretching it esp. with NCR. Some cells like the LGDAS31865 series will have good results all the way to 80mΩ. As with the Sony US18650GR G* series. I wouldn't use them in a powerwall unless that's all I had.
I definitely wouldn't mix them into a pack with 30mΩ to 40mΩ cells.
INR chemistry (high drain) will generally have a much lower resistance with 12mΩ to 25mΩ the norm. Since I did my study on how cells behave in parallel I choose to stick with basically ICR or equivalent hybrid chemistry with similar IR ranges to balance my packs as close as possible considering a relatively close mAh and IR window.
Wolf
 
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