Test/review of Samsung INR21700-50G 5000mAh (Green)

Samsung INR21700-50G 5000mAh (Green)





Official specifications:

  • Capacity: 5000mAh




Samsung high capacity 21700 cells










The two cells tracks perfectly, they handle 15A nicely. It looks like they must be drained fairly low to get full capacity.





They may handle 15A nicely, but they do get rather warm doing it.

















Conclusion

The batteries looks good with lot of capacity and are fairly good at delivering current.



Notes and links

The batteries was supplied by Vapcell for review.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries

Thank you for the review.

Thank you again for the review!

Interesting to see that the positive contact is not as deeply recessed as on the Vapcell G50.

Thanks HKJ! Do you have plans to test the Molicel M50a? I’m curious to see how it compares to this. Thanks for all your work testing.

I’m really appreciated works done by HKJ, tq.

Thank you for the review!

Mooch tested the M50A
Molicel Test

My first thought was: wasn’t this tested before.
Then I noticed that was the 50E, and this is the 50G.

Many thanks for all your testing.
I never buy anything without looking first if you have tested it. :student:

Thanks for sharing! I was hoping the Molicels would be slightly better. Looks like they might be slightly better for high drain applications over 10A. Thanks again!

I’m wondering why this does not have a recessed top like the Vapcell 50G

Thank you very much for HKJ’s test

But I have a question

we compared the vapcell G50 with the Samsung 50g, which is the same cell

Curve comparison also shows that

But vapcell G50 was cut off immediately during 15A discharge. Was the temperature too high to prevent the discharge? Why does the same cell have this difference

thank you

It was a temperature cut-off, but exactly why it happen to the Vapcell and not the Samsung I cannot explain.
I can see the ambient temperature is about 1°C cooler for the Samsung, that is hardly enough to explain it. Other reasons can be different placement of temperature sensor and different connection resistance (Higher resistance would produce more heat).

Same thing with my Epoch 21700. Recessed top. It says 50G on the can after I removed the label.

Mine are stamped: 2J23 => Feb 03, 2019

HKJ has 2J84 => Aug 04, 2019

Maybe they made a revision, and we have V1?

Edit

Just noticed on HKJs’… it has a 2 on it before the date code “2 [space] 2J84”

Maybe that means 50G Revision 2. Just like how new Samsung 30Q’s have a 6 on ’em. “6 [space] KH1T”. Revision 6 of the 30Q?

Just a theory.

The Vapcell G50 I got don’t look recessed either… could it be there are a few different variations of the Samsung 50G, one variant having a top that’s more recessed and another that isn’t that recessed?

Does anyone know where to buy the a Samsung 50G?

It’s interesting to see how close are the discharge curve shapes for 48G, 50E and 50G.

For the same cell, the positive pole is slightly concave, but it is not obvious

Samsung cell is a big international brand, all of which are consistent in appearance

Unless Samsung is customized for some big companies

we have some 50G, liionwholesale have vapcell G50,it is samsung 50G