Test/review of Gpower 18650 2600mAh (Yellow-black)

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HKJ
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Test/review of Gpower 18650 2600mAh (Yellow-black)

Gpower 18650 2600mAh (Yellow-black)
DSC_6946
Official specifications:


  • Capacity: 2600mAh
  • Maximum Continuous Discharge Current: 25A
  • MAX Discharge Current: 40A
  • Nominal Voltage: 3.7V
  • Voltage at end of Discharge: 2.5V
  • Material: Li-ion
  • Length: 65.30mm
  • Diameter: 18.20mm

Gpower%2018650%202600mAh%20(Yellow-black)-info
According to specification they are modern high current cells.
DSC_6931
DSC_6947 DSC_6948
DSC_6949
DSC_6950
DSC_6951
Gpower%2018650%202600mAh%20(Yellow-black)-Capacity
These curves do not looks good, one cell is 2800mAh and the other 2300mAh.
Gpower%2018650%202600mAh%20(Yellow-black)-Temp-15.0
Gpower%2018650%202600mAh%20(Yellow-black)-Temp-20.0
One cell reach 80°C and the other 86°C at 20A.
Gpower%2018650%202600mAh%20(Yellow-black)-Temp-30.0
At 30A they get a bit warmer, but due to thermal delay I do first measure it after I have stopped the discharge.
Gpower%2018650%202600mAh%20(Yellow-black)-CapacityTimeHours
Gpower%2018650%202600mAh%20(Yellow-black)-CapacityTime
Gpower%2018650%202600mAh%20(Yellow-black)-Energy
Gpower%2018650%202600mAh%20(Yellow-black)-PowerLoadTime
Gpower%2018650%202600mAh%20(Yellow-black)-TripCurrent
One of the cells cannot handle 15A, before it is warm and this test do not give it time to warm up.
Gpower%2018650%202600mAh%20(Yellow-black)-Charge
Conclusion
I do not like these cells, they are very different. The B cell has most capacity, but need to be warm before it can deliver high current.
As 2600mAh high current cells they are bad.
Notes and links
The batteries was supplied by gpower-battery.com 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/

Barkuti
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hIKARInoob
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For a true feast put the G-power 2600 in the comparator with the G-power 3000.

dchomak
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The wrapper states that it is an ICR cell rated at 2600mAh and 40A
How could an ICR cell ever possibly deliver that kind of current. The label must be wrong.

Barkuti
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Answer for dchomak: Mooch's

Quote:
Lithium-cobalt batteries, often called ICR (along with some hybrid batteries), are capable of very high discharge rates as seen in a lot of prismatic LiPo's. The Aspire 1800mAh and 2600mAh Tesiyi batteries have a solid 25A rating.

Since the 30A rating for the Avatar is labeled as "max" I suspect it's a 20A-25A continuous battery.
This could even just be a hybrid chemistry cell since LG uses the "ICR" model number prefix (it's not a chemistry) for that type of cell.

https://www.e-cigarette-forum.com/forum/threads/wismec-avatar-icr-18650-battery.748725/#post-17989517

 

Cheers Party