Test/review of Efest IMR14500 650mAh (Purple) 2017

4 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 11 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark
Test/review of Efest IMR14500 650mAh (Purple) 2017

Efest IMR14500 650mAh (Purple) 2017
DSC_0254
Official specifications:


  • Capacity: 650mAh
  • Charging Voltage: 4.2v
  • Maximum Discharge Current: 6.5A
  • Maximum Pulse Current: 9.75A
  • Maximum Charge Current: 650mA (1C)
  • Recommended Discharge Termination: 2.75v

Efest%20IMR14500%20650mAh%20(Purple)%202017-info
14500, i.e. AA sized LiIon batteries from Efest, rated for good capacity and high current.
DSC_0253
DSC_0255 DSC_0256
DSC_0257
DSC_0258
DSC_0259
Efest%20IMR14500%20650mAh%20(Purple)%202017-Capacity
The discharge curves tracks kust about prefectly and the batteries can deliver nearly 7A before capacity starts to drop. This looks good.
Efest%20IMR14500%20650mAh%20(Purple)%202017-Temp-7.0
Temperature also looks fine at 7A
Efest%20IMR14500%20650mAh%20(Purple)%202017-CapacityTimeHours
Efest%20IMR14500%20650mAh%20(Purple)%202017-CapacityTime
Efest%20IMR14500%20650mAh%20(Purple)%202017-Energy
Efest%20IMR14500%20650mAh%20(Purple)%202017-PowerLoadTime
Efest%20IMR14500%20650mAh%20(Purple)%202017-TripCurrent
Efest%20IMR14500%20650mAh%20(Purple)%202017-Charge
Conclusion
Performance looks very good on these cell, both capacity and current handling is good.
Notes and links
The batteries was supplied by Efest 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
Comparison to other LiIon batteries

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

atbglenn
atbglenn's picture
Offline
Last seen: 2 years 5 months ago
Joined: 07/29/2011 - 12:04
Posts: 5766
Location: Long Island, New York

I bought 4 of these in June 2016. I’m assuming they’re considered the 2017 version you tested since they look exactly the same.

Boycott Nike

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 11 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark

atbglenn wrote:
I bought 4 of these in June 2016. I’m assuming they’re considered the 2017 version you tested since they look exactly the same.

!{width:90%}http://i.imgur.com/tJE12z4.jpg!

2017 is because I received them in 2017 (I got a pile from Efest).

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

atbglenn
atbglenn's picture
Offline
Last seen: 2 years 5 months ago
Joined: 07/29/2011 - 12:04
Posts: 5766
Location: Long Island, New York

Ok thanks. Anyway, I think they’re great cells.

Boycott Nike