Test/review of Efest IMR18650 3000mAh (Purple) 2017

2 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 22 hours 3 min ago
Joined: 05/24/2011 - 12:23
Posts: 7448
Location: Copenhagen, Denmark
Test/review of Efest IMR18650 3000mAh (Purple) 2017

Efest IMR18650 3000mAh (Purple) 2017
DSC_0299
Official specifications:


  • Rated capacity: 3000mAh
  • Nominal voltage: 3.7V
  • Voltage at end of discharging: 2.5V
  • Max. charging current: 4A
  • Standard charge: 2A
  • Discharging current 35A    Oops, Efest has a typo
  • Pulse discharging current: 60A    Oops, Efest has a typo
  • Charging temperature range: 0°C ~ 45°C
  • Discharging temperature range: -20°C ~ 75°C
  • Inner resistance: 20mOhm
  • Cell size: 18.50 (±0.20)mm x 65.20 (±0.2)mm

Efest%20IMR18650%203000mAh%20(Purple)%202017-info
A high capacity 18650 battery with fairly high current.
DSC_0297 DSC_0298
DSC_0300 DSC_0301
DSC_0302
DSC_0303
DSC_0304
Efest%20IMR18650%203000mAh%20(Purple)%202017-Capacity
The two cells tracks nicely.
Efest%20IMR18650%203000mAh%20(Purple)%202017-Temp-15.0
They get rather hot at 15A
Efest%20IMR18650%203000mAh%20(Purple)%202017-Temp-20.0
And even more so at 20A, where I have to stop the discharge due to temperature.
Efest%20IMR18650%203000mAh%20(Purple)%202017-Temp-30.0
Efest%20IMR18650%203000mAh%20(Purple)%202017-CapacityTimeHours
Efest%20IMR18650%203000mAh%20(Purple)%202017-CapacityTime
Efest%20IMR18650%203000mAh%20(Purple)%202017-Energy
Efest%20IMR18650%203000mAh%20(Purple)%202017-PowerLoadTime
Efest%20IMR18650%203000mAh%20(Purple)%202017-TripCurrent
Efest%20IMR18650%203000mAh%20(Purple)%202017-Charge
Conclusion
This cell looks like a very good cell and it can deliver about 15A continious.
Notes and links
The batteries was supplied by Efest for a 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

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

Henk4U2
Henk4U2's picture
Online
Last seen: 2 min 32 sec ago
Joined: 02/13/2014 - 17:52
Posts: 4181
Location: The heart of the Netherlands (GMT+1)

Thanks for the review. The outcomes are only marginally different from Samsung 30Q.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.