Keeppower 21700 5000mAh P5150TC (White-Blue) 2020

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Official specifications: Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-info

This is a 21700 cell with build-in USB-C charger, the cell is a protected high capacity cell.

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Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-Capacity

The two cells match just about perfect and can easily deliver the rated 8A.

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-Temp-7.0

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-Temp-10.0

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-CapacityTimeHours

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-CapacityTime

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-Energy

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-PowerLoadTime

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-TripCurrent

Keeppower%2021700%205000mAh%20P5150TC%20(White-Blue)%202020-Charge

USB%20Charge%20Test%2020210703001627

The USB charging uses a switching regulator to keep the heat down, I measured about 10C temperature increase at the front of the cell during charge.
The USB-C input do not follow any protocols, except signalling it needs power.

Discharge-Keeppower%2021700%205000mAh%20P5150TC%20%28White-Blue%29%202020-pulse-1.0%2010%2010-IR



Conclusion

It is a good battery and the USB charging means it can share charger with a mobile phone, this is very practical when traveling or when having only a few LiIon batteries. Only caveat is that the battery is considerable longer than a standard 21700 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