Test/review of Keeppower 26650 5500mAh P2655C (Black)

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HKJ
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Test/review of Keeppower 26650 5500mAh P2655C (Black)

Keeppower 26650 5500mAh P2655C (Black) 2020
DSC_4132
Official specifications:


  • Voltage: 3.70V
  • Typical capacity: 5500mAh
  • Minimum Capacity: 5400mAh
  • Discharge cut-off voltage: 2.50V
  • Charge voltage: 4.20V +/- 0.05V
  • Standard charge current: 2000mA
  • Maximum constant discharge current: 10A

Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-info
This is a LiIon 26650 cell, i.e. a fairly large cell and it also has more capacity than smaller cells.
DSC_4130 DSC_4131
DSC_4133 DSC_4134
DSC_4135
DSC_4136
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-Capacity
The two cells do not match very well, they cell can deliver the rated current.
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-Temp-10.0
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-Temp-15.0
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-Temp-20.0
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-CapacityTimeHours
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-CapacityTime
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-Energy
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-PowerLoadTime
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-TripCurrent
Keeppower%2026650%205500mAh%20P2655C%20(Black)%202020-Charge
Discharge-Keeppower%2026650%205500mAh%20P2655C%20%28Black%29%202020-pulse-1.0%2010%2010-IR
Conclusion
I am not very impressed by these cells, they do not match and get fairly warm at “high” current. They do have a small capacity advantage over 21700 cells.
Notes and links
The batteries was supplied by Keeppower for 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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Superstocker
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Thanks HKJ. A little disappointed with keeppower. Their cells usually seem to match well.

xxo
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Superstocker wrote:
Thanks HKJ. A little disappointed with keeppower. Their cells usually seem to match well.

+ 1.

In general, 26650 cells don’t seem to be as refined as the better 18650 and 21700 cells.

Anyway, thanks much for the review.