Test/review of Gpower 18650 3000mAh (Yellow-black)

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HKJ
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Test/review of Gpower 18650 3000mAh (Yellow-black)

Gpower 18650 3000mAh (Yellow-black)
DSC_6932
Official specifications:


  • Capacity: 3000mAh
  • MAX Discharge Current: 40A
  • CDR (Continuous Discharge Current): 20A
  • Voltage: 3.7v
  • Material: Li-ion
  • Length: 65.30mm
  • Diameter: 18.20mm
  • Top: Flat top(18mm 65mm)
  • Warranty: 12 months

Gpower%2018650%203000mAh%20(Yellow-black)-info
A high capacity high current rated cell.
DSC_6931
DSC_6933 DSC_6934
DSC_6935
DSC_6936
DSC_6937
Gpower%2018650%203000mAh%20(Yellow-black)-Capacity
This chart is a mess, the two cells has different capacity. At 0.2A A was 2435mAh and B was 2749mAh, neither reach the specified 3000mAh
Gpower%2018650%203000mAh%20(Yellow-black)-Temp-15.0
Both cells can handle 15A without getting too hot.
Gpower%2018650%203000mAh%20(Yellow-black)-Temp-20.0
At 20A the B cell gets too hot and I terminate the test.
Gpower%2018650%203000mAh%20(Yellow-black)-Temp-30.0
The B cell cannot handle 30A, the A cell gets too hot after some time.
Gpower%2018650%203000mAh%20(Yellow-black)-CapacityTimeHours
Gpower%2018650%203000mAh%20(Yellow-black)-CapacityTime
Gpower%2018650%203000mAh%20(Yellow-black)-Energy
Gpower%2018650%203000mAh%20(Yellow-black)-PowerLoadTime
Gpower%2018650%203000mAh%20(Yellow-black)-TripCurrent
Gpower%2018650%203000mAh%20(Yellow-black)-Charge
Conclusion
I do not like these cells, both are below specifications and they are very different.
As 3000mAh 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/

Keron
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Joined: 06/14/2014 - 16:54
Posts: 257
Location: H4

thanks for revealing another not so good cell