Test/review of Vapcell INR21700 5000mAh P2150A (Black-purple) 2021

Batteries and Chargers Rechargeable Batteries
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Vapcell INR21700 5000mAh P2150A (Black-purple) 2021







Official specifications:

  • Model: INR21700 5000mah 10A

  • Size: 21.1*70.5mm

  • Typical Capacity: 5000mAh (0.2C discharge)

  • Min capacity: 4800mAh (0.2C discharge)

  • Nominal voltage: 3.60V

  • Max Continuous Discharge Current: 10A

  • End-of-charge voltage: 4.20V

  • End-of-discharge Voltage: 2.5V

  • Weight: 76g ( Appr)

  • Internal resistance: 28mOhm ( Appr) AC 1kHz?

  • Standard Charge: 1500mA,CCCV 100mA cut-off

  • USB charge model : CC CV

  • USB input power : 5.0v ,>1.0A

  • USB end-of-charge voltage : 4.20V

  • USB CC mode charge current: 1000mA

  • USB CV mode charge current :100mA

  • USB output : 5.0v ,max 1.5A

  • Over charge protection voltage: 4.25+0.1/-0v

  • Over discharge protection voltage 2.50+0/-0.1V

  • Over current protection current: 12A ~ 18A



This is a high capacity 21700 LiIon battery with USB-C charging input and the USB-C connector can also supply 5V output, i.e. it can work as a power bank.





There is a multicolored led behind the hole in the plus pole, it is used for charging and power bank functions.









The two cells tracks nicely and can deliver the rated 10A.



















The battery only increase temperature with about 10°C during USB charging, but the rated 1A charge input current is not correct, it is 1.5A
The USB-C input uses resistor coding to decide between charging and power bank, but it ignores any current rating on the USB-C port.





Power bank



USB-C output is rated at 1.5A and can deliver a bit above 1.6A, that is fine.



At 0.5A load it can deliver above 3Ah, i.e.more than 6 hours of power. It turns output off when battery is down to about 2.9V.



At 1.5A load it can deliver nearly 3Ah, i.e. about 2 hours of power. I did check the temperature during discharge and it was not more than a 14°C increase at the front of the battery (i.e. the boost converter).



Noise is 62mVpp and 8mV rms at 0.5A



Noise is 62mVpp and 8mV rms at 1A



Conclusion

This battery works fine, both as a battery and as a power bank.

I am not sure that building a power bank into a LiIon battery is a good idea, it would at least require plastic cap to place on the plus pole of the battery when used as a power bank, to prevent any shorts from the plus pole.



Notes and links

The batteries was supplied by Vapcell 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
2

Great review, very detailed
Thank you

3

Thanks a lot HKJ. This one has a bottom vent, a hallmark of LISHEN cells. Is it LR2170SD?

4

I have no idea, but somebody has talked about getting my some Lishen cells, if that succeed it may be possible to compare them.

5

Acebeam has had a 21700 5000mha (now 5100) type C in and out for almost 2 years and they put it in a few of their lights and sell it separately. For about a year prior to that they had probably the same battery with a micro USB in and out. I measured the micro USB one at just over 0.5 amp out. It came in the Acebeam W30. Manker has a 13650 with C in and out. I think somebody has one with a 18650 also. I suppose in a pinch the power bank might come in handy once in a while with the 21700. And the charging feature might be useful for some people more often.

6

Has anyone tried this Vapcell P2150A? How practical is it?

At 76g for 5000mAh, it’s incredibly close to the energy density of the Nitecore NB10000 (150g for 10,000mAh)!

At 76.4mm long though, it’s not going to work in every light.

1 Thank