Test/review of Keeppower 18650 3120mAh P1831R (Black) 2017

[size=+3]Keeppower 18650 3120mAh P1831R (Black) 2017[/size]



Official specifications:

• Part No.: P1831R
• Protected 18650 Li-ion Rechargeable Battery
• Minimum Capacity: 3000mAh
• Typical Capacity: 3120mAh
• Normal Voltage: 3.7V
• Maximum Continuous Charging Current: 5A
• Maximum Continuous Discharging Current: 15A
• In Built Safety Circuitry
• Protection Circuit (Against over charge, over discharge, over current and short-circuit.)
• 4.20V maximum voltage and 2.50V cut-off voltage
• Over 500 charge-discharge cycles
• Max. Size: 18.8 x 69.0mm
• Weight: 48g
• Max. 15A Continuous Discharge Current

A protected battery that can deliver a lot of current and has good capacity.










The discharge curves tracks very fine.
The B battery jumps a bit in voltage, it looks like a loose connection in my test setup.



A full discharge at 15A is a bit much for this battery, it gets rather hot. I had to stop one of the discharges.



At 15A I had to stop both discharges due to temperature.

















[size=+3]Conclusion[/size]

This is a good cell, but the build in protection do not trip on overload (It will probably trip on higher currents).



[size=+3]Notes and links[/size]

The battery 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
Compare to 18650 and other batteries

Thanks for the review.

I believe that is a Sony VTC6 cell in there. The same cell is on Skylumens and Illumn's website and that is what they list it as.


https://www.illumn.com/batteries-ch...vtc6-protected-high-discharge-button-top.html