Test/Review of EagleTac 18650 3100mAh (Black)

HKJ

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[size=+3]EagleTac 18650 3100mAh (Black)[/size]

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Official specifications:
  • 3100mAh IC PROTECTED Rechargeable Cell (takes the place of 2-R123 cells in some applications) (4.2V hot off charger)
  • Uses newest Panasonic 3100mAh LiNiCoAlO2 cells, made in Japan
  • This is the shortest ultra high capacity 18650 ever made WITH protrude top button!
  • Measures only 68mm in height (+/-0.1mm) and 18.5mm in width
  • IC protected for a) over-charge, b) over-discharge, c) short circuit, d) current overflow of 5A+
  • True protrude top design, fits all flashlights
  • High discharge rate 4A-5A
  • Nominal voltage: 3.7V, charge up to 4.2V, use CC/CV charger to charge
  • Reinforced steel plate bottom, highly efficient protective PCB design
  • Packaged in individual box and anti-static bag


EagleTac%2018650%203100mAh%20(Black)-info.png


The cell used can be discharged down to 2.5 volt, in my test I only discharges to 2.8 volt, i.e. I do not measure the full capacity. But then, not all lights will be able to use the full capacity.

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EagleTac%2018650%203100mAh%20(Black)-Capacity.png


EagleTac%2018650%203100mAh%20(Black)-CapacityTimeHours.png


EagleTac%2018650%203100mAh%20(Black)-CapacityTime.png


EagleTac%2018650%203100mAh%20(Black)-Energy.png


EagleTac%2018650%203100mAh%20(Black)-PowerLoadTime.png


EagleTac%2018650%203100mAh%20(Black)-TripCurrent.png


The two batteries does not have the same current limit, on trips at 6 ampere the other at 6.5 ampere.
The current limit is placed low enough to prevent overloading the cell, this is very good for people that want maximum battery lifetime without any risk of accidents, but not for people that want to play with high current direct drive configurations.

EagleTac%2018650%203100mAh%20(Black)-Charge.png




[size=+3]Conclusion[/size]

This battery uses a good cell, this secures many things:
  • The batteries does match in capacity, i.e. they can be used in series.
  • The battery is very safe.
  • The battery has the specified capacity (But only when tested at the specified conditions).


All in all a very good battery.



[size=+3]Notes and links[/size]

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
 

RI Chevy

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Probably to make the batteries as short as possible.
Most of the other cell makers that use the NCR18650A use the large, low flat type of button top. I thought that was pretty flat. But thanks for the review.
 

orbital

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+

Perfect button top NCR18650A, {not to mention possibly the shortest}
I'v been using three EagleTac 3100s' the last 5 weeks,...they are damn good!:whistle:

yep
 

chewy78

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they work ok in all my lights but had a problem with a pcb on one of them.
 
Last edited:

madecov

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Houston, Texas
Mostly, but notice that the button top is a very low button top. There might be a light or two (But not many) that has problems with that.

My Eagletac T20C2 MKII (XML) will not work with AW, Callies or Redilast 3100's. It works great with the Eagletac brand cells. My Maelstrom X7 works with the other cells intermittently, but is reliable with the Eagletacs.
 

rastigo

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May 30, 2012
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I feel the Ultrafire battery is the best for durability, long life and runtimes
 

loquutis79

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Jan 8, 2012
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Ontario Canada
Maybe we should stop with all the good comments about Eagletac batteries before they jack the price up on us. :)

I switched from AW to Eagletac based on the way they charge and the price. Glad I did. So far I am very pleased with this battery. I have 4 more 18650's coming to me in the mail as I type.

And I can get them here in Canada so I don't have to worry about the shipping crap issues right now.
 

Sparky's Magic

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Picked up a couple of the current EagleTac 3100mAh. Cells (white wrapper) & couldn't be happier! They come off my Pila charger at 4.19V. fit all my 'lights, which the Panasonic (black) don't and give superior run-time. A couple of AW3100's with about a dozen cycles are still coming off at 4.11V...., so I changed ship! The E/T's are considerably cheaper as well. :thumbsup:
 

sidecross

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Jul 29, 2012
Messages
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Picked up a couple of the current EagleTac 3100mAh. Cells (white wrapper) & couldn't be happier! They come off my Pila charger at 4.19V. fit all my 'lights, which the Panasonic (black) don't and give superior run-time. A couple of AW3100's with about a dozen cycles are still coming off at 4.11V...., so I changed ship! The E/T's are considerably cheaper as well. :thumbsup:

My Eagletac 18650 3100mAh are white too and I am as pleased as you are.
 
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