Test/Review of LG INR18650 MJ1 (3500mAh, 10A)

Batteries and Chargers Rechargeable Batteries
1

LG INR18650 MJ1 vs Samsung SDI INR18650-35E:

These cells are rated for 10A max. discharge current (the datasheet does not mention “continuous”). At 10A full discharge they get very hot, around 90°C. Not recommended.
I wouldn’t use them above 7A continuously. 10A for 1 or 2 minutes is no problem though.

LG INR18650 MJ1 capacity, energy, average voltage on discharge to 2.50V:
table(table#posts).
|A|Ah|Wh|V|
|1.0|3.400|12.360|3.635|
|3.0|3.390|11.929|3.519|
|5.0|3.400|11.660|3.430|
|7.0|3.382|11.351|3.356|
|10.0|3.341|10.877|3.256|

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Compare with NCR18650GA here.
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Cells #1 and #2 were provided by ENERdan for test, #3 and #4 purchased at nkon.nl.
Very nice tracking, see detail of discharge graph:

2

Really thanks for testing & posting this here :slight_smile:

From your discharge curves i draw the conclusion that from the 10A 3400mha cells the GA seems to be the strongest for DD driven flashlights.

3

Theoretically, yes. Practically, I don’t know. The differences between NCR GA, LG MJ1 and SDI 35E are small.
And there are also other things to consider that are not covered in these tests, like cycle life and temperature dependence (winter is coming, at least in northern hemisphere). After 20 or 50 cycles things could be different.

4

I am gonna work with LG 18650 MJ1 cells and curves which you have posted are very useful to move further.
From tabulation , it came to know that for a 10 A discharge rate , the test was conducted upto 20 min.So,I just want to know that the temperature you specified[90 C] is taken after the 20 min of test (or) 1 (or) 2 min test?

thanks…,

5

Taking a look at my review may give you a better view of time and of temperature: Test/Review of LG 18650 MJ1 3500mAh (Green)

6

At the end.
The cells are always hottest at the end of discharge.
HKJ’s new test setup provides details on temperature. But his results are similar: they get too hot at full discharge with 10A.