Highstar isr18650-2000 mah

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Korishan

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Jan 7, 2017
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6,552
ocaluptous said:
mike said:
You would have to check the datasheet from the manufacturer. Those cells are your typical Chinese special. Unfortunately, you probably won't find a datasheet and I wouldn't even use them.

If you have a minute to take pictures, we can at least get them added to the Cell Database.
here is a datasheet for a similar cell.

I think you forgot to add the file. ???
 

kc8adu

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Joined
May 22, 2019
Messages
107
Korishan said:
ocaluptous said:
mike said:
You would have to check the datasheet from the manufacturer. Those cells are your typical Chinese special. Unfortunately, you probably won't find a datasheet and I wouldn't even use them.

If you have a minute to take pictures, we can at least get them added to the Cell Database.
here is a datasheet for a similar cell.

I think you forgot to add the file. ???
seems ok on this end.
 

gauss163

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Jun 28, 2020
Messages
278
^^^ Nowadays we can't deduce much of anything from 3.6V vs. 3.7V "nominal voltage" because nominal voltage has no standard definition. In particular it cannot be used to deduce anything about maximum current capability ("high current").
 

Overmind

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Jan 16, 2019
Messages
449
I completely disagree.

Assuming a site lists the specs correctly, any power tool manufacturer and any high current cell manufacturer will give 3.6V as standard nominal for high drain.
That's why you see in most serious brands batteries like 14.4, 18, 36V and on any Samsung Q and later cell you see an official spec rating of 3.6.

While that, all old ICRs are definitely 3.7 only.

There are some mid-way considerations when it comes to some now-day's hybrid INRs, which state 3.65, but that's exactly what a non-high-drain INR would standardize to.

So that rating is of maximum relevance when you don't have max current as stated spec.
 

Overmind

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Jan 16, 2019
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Putting default spces on a site of which administration is most of the time a random copy-paste operator has zero relevance.
 

gauss163

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Jun 28, 2020
Messages
278
^^^ fyi: the spec's listed in HKJ's reviews are excerpted from the manufacturer datasheets, including the nominal voltage, as can easily be checked.

Since the search I gave in post #10 reveals a few hundred high-drain IMR/INR cells that are 3.7V nominal, and less than half as many that are 3.6V nominal, this implies that your guess in post #9 that "any high current cell manufacturer will give 3.6V as standard nominal for high drain" is false.

Again, nowadays 3.6V vs. 3.7V nominal doesn't imply much of anything (not even anything about "average" voltage, since many manufacturers list the higher 3.7V in order to get inflated Wh numbers for marketing purposes).

In the old days when many cells were nominal 3.6V cells that could only be charged to 4.10V then it had a little more meaning. That's why many older RC/hobby chargers had the 3.6V/4.10V setting. Nowadays this has shifted to the distinction between 3.7/4.20V vs. 3.8/4.35V (LiHV).
 

Overmind

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Joined
Jan 16, 2019
Messages
449
Want to see the true nominal of a cell ? Measure voltage over time, pick the high end of the Gauss and that's it.

Samsung QtoT - Nominal voltage 3.6V: https://datasheetspdf.com/pdf/839321/Samsung/INR18650-25R/1
LG HGs - Nominal voltage 3.6V: https://cdn.webshopapp.com/shops/275790/files/260265422/20170331-ps-lg-inr-18650hg2.pdf
Sony VTs - Nominal voltage 3.6V: https://datasheetspdf.com/pdf/1160671/DSBG/US18650VTC4/1
Sanyo/PA - Nominal voltage 3.6V: https://datasheet4u.com/datasheet-pdf/Panasonic/CGR18650CG/pdf.php?id=774617

I consider any other comments irrelevant and off-topic.
 
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