Test/review of Keeppower IMR18650 NH1831 3120mAh (Black) 2016

Batteries and Chargers Rechargeable Batteries
1

Keeppower IMR18650 NH1831 3120mAh (Black) 2016







Official specifications:

  • Nominal capacity: 3120mAh

  • Minimum capacity: 3000mAh

  • Nominal voltage: 3.70V

  • Charge voltage: 4.20V 0/-0.05V

  • Standard discharge cut-off: 2.50V

  • Standard charge current: 1000mA

  • Charge current cut-off: 50mA

  • Max. Constant discharge current: 30A




A high current and high capacity cell from Keeppower.










There is no doubt this is a quality battery, the curves track perfectly and capacity is nearly constant with current.
At high current the battery gets hot and I stopped the 30A test due to that.





At 20A the cell gets rather hot, but it stayed just below 80°C



At 30A discharge the temperature reached 86°C, but first after I stopped at 80°C.















Conclusion

This is a very good high current battery, but 30A will need a temperature cutout to stay safe.



Notes and links

The batteries was supplied by Keeppower 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
Compare to 18650 and other batteries
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Thanks for test, HKJ!

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+1

Does anybody know, what cell is used? As far as I understand, Keeppower relables selected quality cells.

Is it real IMR chemistry (LiMg)

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The discharge curves match with Sony VTC6

5

It is a Sony VTC6.

All these batteries

Sony VTC4 / 5 / 5A / 6
LG HB2 / 4 / 6 – HD2 / HD2C – HE2 / 4 – HG2
Samsung 20Q / 20R / 25R / 30Q
Sanyo NSX

are NMC

IMR batteries over 2200mAh there.
Stronger IMR battery is the Sanyo UR18650 RX 2050mAh 20A