Test/review of Keeppower 21700 5000mAh P2150K (Black) 2019

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HKJ
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Test/review of Keeppower 21700 5000mAh P2150K (Black) 2019

Keeppower 21700 5000mAh P2150K (Black) 2019
DSC_6872
Official specifications:


  • Capacity typ.: 4900mAh
  • Capacity min.: 4750mAh
  • Nominal voltage: 3.70V
  • Charge voltage: 4.20+/-0.05V
  • Standard discharge cut-off voltage: 2.50V
  • Standard charge current: 2450mA
  • Charge termination current: 100mA
  • Max. continuous discharge current: 10A

Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-info
This is a high capacity 21700 cell with added protection circuit.
DSC_6870 DSC_6871
DSC_6873 DSC_6874
DSC_6875
DSC_6876
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-Capacity
The discharge curves for the two cells matches very fine, the protection trips after some time with 10A load.
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-Temp-7.0
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-Temp-10.0
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-CapacityTimeHours
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-CapacityTime
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-Energy
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-PowerLoadTime
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-TripCurrent
Keeppower%2021700%205000mAh%20P2150K%20(Black)%202019-Charge
Keeppower%2021700%205000mAh%20P2150K%20%28Black%29%202019-Pulse-1A-10-10-2.8V-IR
Conclusion
This is a very good quality cell with about maximum capacity for this size. The protection adds a few safeguards to the cell.
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/

xxo
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Thanks for the review!

What charger(s) would you recommend for these cells?

3D printed battery adapters for sale: http://budgetlightforum.com/node/69377

RapidLux
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I like Keeppower batteries in itself. Only problem is that that BT is made of a much too soft alloy, and easily deforms. Samsung has much more sturdy BT on their batteries.

Superstocker
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Thanks HKJ!

Barkuti
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RapidLux wrote:
… Samsung has much more sturdy BT on their batteries.

Samsung has no interest in attaching button tops to their cells, that is done by a 3rd party business.