[HKJ]

Samsung INR18650-20Q 2000mAh (green)



Official specifications:

• Battery Capacity (Mfg Rated): 2000 mAh
• Battery Chemistry: LI-Ion
• Battery Feature: Rechargeable
• Battery Form Factor: 18650
• Battery Maximum Voltage: 4.2 V
• Battery Minimum Voltage: 2.5 V
• Battery Rated Voltage: 3.6 V
• Current Output: 15 A
• Brand: Samsung
• Diameter: 18.1 mm
• Height: 64.8 mm
• Product Weight: 43 g

Thse are high power batteries for use in tools.










The cells can deliver 20A with full capacity and the maximum difference in capacity is about 0.6%.
The voltage at the lower currents is not very impressive, but in the 10A to 20A range it can match IMR cells, but with greater capacity.















Conclusion

This is a very good battery, but there is no reason to use it, except if you need a lot of current.
The R version of the battery is slightly better.



Notes and links

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
Comparison to other LiIon batteries

[vvvoland]

 Сообщение от HKJ :

The R version of the battery is slightly better.

Yes R is slightly better, but the Q is very good.
For high currents

[vvvoland]

my test:
Samsung-20Q-I (current) 3A discharge up to 3V
Samsung-20Q-18650-2-(4,2-3A)1969mAh-7,05Wh
Samsung-20Q-18650-4-(4,2-3A)1987mAh-7,12Wh

Samsung-20Q-I (current) 10A discharge up to 3V
Samsung-20Q-18650-2-(4,2-10A)1935mAh-6,59Wh
Samsung-20Q-18650-1-(4,2-10A)1896mAh-6,44Wh

[HKJ]

 Сообщение от vvvoland :

my test:
Samsung-20Q-I (current) 3A discharge up to 3V
Samsung-20Q-18650-2-(4,2-3A)1969mAh-7,05Wh
Samsung-20Q-18650-4-(4,2-3A)1987mAh-7,12Wh

Samsung-20Q-I (current) 10A discharge up to 3V
Samsung-20Q-18650-2-(4,2-10A)1935mAh-6,59Wh
Samsung-20Q-18650-1-(4,2-10A)1896mAh-6,44Wh

You can always use my comparator to directly compare any two 18650 I have tested: http://lygte-info.dk/review...

[viperxp]

HKJ, have you started working on the XP4 review?
It is one of the most desired reviews at the moment

thanks for the review, your hard work is very appriciated.

[HKJ]

 Сообщение от viperxp :

HKJ, have you started working on the XP4 review?
It is one of the most desired reviews at the moment

I am nearly finished with it.

[viperxp]

 Сообщение от HKJ :

I am nearly finished with it.

Great news, can't wait to see it . I have already started using it myself, and so far very very happy with it. Hope you don't ruin me .

[vvvoland]

 Сообщение от HKJ :

You can always use my comparator to directly compare any two 18650 I have tested: http://lygte-info.dk/review...

Thank you! I know and use your comparators with pleasure
this comparator http://lygte-info.dk/review...
and that for smaller http://lygte-info.dk/review...

but I'm wondering the study itself.
method of measurement - I've read your reviews with pleasure
I have for test: iCharger 208B, iCharger 3010B, iCharger 4010 DUO(4,35V), АRRAY 3710
Thank you very much.

[vvvoland]

 Сообщение от HKJ :

I am nearly finished with it.

 Сообщение от viperxp :

Great news, can't wait to see it

[HKJ]

 Сообщение от vvvoland :

I have for test: iCharger 208B, iCharger 3010B, iCharger 4010 DUO(4,35V), АRRAY 3710

The array is the best one, especially if it has remote sense.

[vvvoland]

 Сообщение от HKJ :

The array is the best one, especially if it has remove sense.

Accuracy of Araya is high, but the software bundled old, and there is no USB ...
have to connect an adapter RS232/USB
He does not know how to charge

[HKJ]

 Сообщение от vvvoland :

Accuracy of Araya is high, but the software bundled old, and there is no USB ...
have to connect an adapter RS232/USB

If the software works and saves in a usable format (like CSV), the age does not matter.
If you got an adapter with it, the serial/usb adapter is usual not a problem. You might also be able to make your own usb cable, if it has one of the typical "ttl level" serial outputs.

 Сообщение от vvvoland :

He does not know how to charge

You could move the batteries to a charger

[vvvoland]

 Сообщение от HKJ :

If the software works and saves in a usable format (like CSV), the age does not matter.
If you got an adapter with it, the serial/usb adapter is usual not a problem. You might also be able to make your own usb cable, if it has one of the typical "ttl level" serial outputs.

yes, CSV(xls) use it
'll deal with cables, and an adapter RS232/USB works.

6mm2 -about 9(10) AWG

 Сообщение от HKJ :

You could move the batteries to a charger

I'm doing, iCharger- charge, АRRAY 3710 - discharge

[HKJ]

 Сообщение от vvvoland :

6mm2 -about 9(10) AWG

At 10A that is about 0.03 volt assuming 2x0.5meter cable. On top of that you have the connections in both ends.

[vvvoland]

 Сообщение от HKJ :

At 10A that is about 0.03 volt assuming 2x0.5meter cable. On top of that you have the connections in both ends.

when measuring the internal resistance of the battery would like to know how many are making the wire.
Resistance my wires (each) 1мОм
0,003[Ohm/m]*0,33м