Gpower 18650 2500mAh (Yellow-black)

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Official specifications:
Gpower%2018650%202500mAh%20(Yellow-black)-info

Medium capacity high current cells.

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Gpower%2018650%202500mAh%20(Yellow-black)-Capacity

These curves do not looks good, one cell is 2800mAh and the other 2300mAh.

Gpower%2018650%202500mAh%20(Yellow-black)-Temp-15.0

Gpower%2018650%202500mAh%20(Yellow-black)-Temp-20.0

One cell reach 74C and the other 88C at 20A.

Gpower%2018650%202500mAh%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%202500mAh%20(Yellow-black)-CapacityTimeHours

Gpower%2018650%202500mAh%20(Yellow-black)-CapacityTime

Gpower%2018650%202500mAh%20(Yellow-black)-Energy

Gpower%2018650%202500mAh%20(Yellow-black)-PowerLoadTime

Gpower%2018650%202500mAh%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%202500mAh%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 2500mAh high current cells they are bad.



The GPower 2600mAh cells have the same difference, are they mixed up? According to the labels on the cells no, but it looks like Gpower may have swapped the labels on some of them. If they had been paired correctly they would be rated better.


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
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