Test/Review of Efest IMR18650 3000mAh (Purple) 2016

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HKJ
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Test/Review of Efest IMR18650 3000mAh (Purple) 2016

Efest IMR18650 3000mAh (Purple) 2016
DSC_3141
Official specifications:


  • Rated capacity: 3000mAh
  • Nominal voltage: 3.7V
  • Max charging current: 4A
  • Standard charge: 2A
  • Max continuous discharge current: 35A
  • Pulse discharge current: 60A
  • Charging temperature range: 0°C ~ 45°C
  • Discharging temperature range: -20°C ~ 75°C
  • Inner resistance: 20mOhm
  • Cell size: 18.5mm x 65.20mm

Efest%20IMR18650%203000mAh%20(Purple)%202016-info
High capacity and high current cell.
DSC_3140
DSC_3142 DSC_3143
DSC_3144
DSC_3145
DSC_3146
Efest%20IMR18650%203000mAh%20(Purple)%202016-Capacity
The cell is very good up to 20A, but at 30A I terminate the test due to temperature. The tracking between the cells shows that they are very well matched.
Efest%20IMR18650%203000mAh%20(Purple)%202016-Temp-15.0
Temperature raise at 15A load, to get the real cell temperature add (about) 25°C to the temperature.
Efest%20IMR18650%203000mAh%20(Purple)%202016-Temp-20.0
Efest%20IMR18650%203000mAh%20(Purple)%202016-Temp-30.0
I had to stop here, my rig melts at this temperature (I hope to improve this).
This is also the maximum discharge temperature for the battery.
Efest%20IMR18650%203000mAh%20(Purple)%202016-CapacityTimeHours
Efest%20IMR18650%203000mAh%20(Purple)%202016-CapacityTime
Efest%20IMR18650%203000mAh%20(Purple)%202016-Energy
Efest%20IMR18650%203000mAh%20(Purple)%202016-PowerLoadTime
Efest%20IMR18650%203000mAh%20(Purple)%202016-TripCurrent
Efest%20IMR18650%203000mAh%20(Purple)%202016-Charge
Conclusion
The battery has very good performance, 20A is no problem, at 30A it is probably best not to use continious discharge.
Notes and links
Improvements to test stations
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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

will34
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Thanks for the test!

HKJ: have you tested the 30Q or a rewrapped version of it? this one seems to be based on the HG2, would be nice to compare these two.

I still don’t understand why efest rate their cell so high. If it’s really pushed to 60A I highly doubt it will stay within safe temperatures inside a vaping mod.

HKJ
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will34 wrote:
HKJ: have you tested the 30Q or a rewrapped version of it? this one seems to be based on the HG2, would be nice to compare these two.

Not yet, I want to test them on my updated test stations, but for my initial tests on them I uses the Efest because they gave me 4 of each cell. This makes it possible to redo the test with a lower temperature limit and a fresh cell when my battery holder melts (Until now I have melted 3 holders).

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

chouster
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Thanks HKJ!

So it’s a LG HG2, which is rated 20A cont., for a good reason obviously. Won’t say more than that… Oops

shadockan
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Wish I became serious the Efest.
This however was a good sample ……….

Henrik ….., words are not enough .

Thank you my friend

Hoop
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What a lovely Haiku, shadockan. Thanks for the test results HKJ; this cell looks great.

JaredM
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will34 wrote:
Thanks for the test!

HKJ: have you tested the 30Q or a rewrapped version of it? this one seems to be based on the HG2, would be nice to compare these two.

I still don’t understand why efest rate their cell so high. If it’s really pushed to 60A I highly doubt it will stay within safe temperatures inside a vaping mod.

The AWT Reds’ are the 30Q and HG2 if I’m not mistaken. 35A and 40A respectively.

@HKJ

Is it possible that your new setup improves ultimate capacity via a “cleaner” charge? It seems your new tests have less noise in the current trace during the CV portion of charging..

HKJ
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JaredM wrote:
@HKJ

Is it possible that your new setup improves ultimate capacity via a “cleaner” charge? It seems your new tests have less noise in the current trace during the CV portion of charging..

I have changed to another power supply, this means the charge voltage is not exactly the same, this means there will be a slight capacity difference.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/