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

Gpower 18650 3000mAh (Yellow-black)







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




A high capacity high current rated cell.











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



Both cells can handle 15A without getting too hot.



At 20A the B cell gets too hot and I terminate the test.



The B cell cannot handle 30A, the A cell gets too hot after some time.















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

thanks for revealing another not so good cell