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

Keeppower 21700 5000mAh P2150K (Black) 2019







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



This is a high capacity 21700 cell with added protection circuit.










The discharge curves for the two cells matches very fine, the protection trips after some time with 10A load.




















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

Thanks for the review!

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

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.

Thanks HKJ!

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