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

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HKJ's picture
Last seen: 5 days 4 hours ago
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Location: Copenhagen, Denmark
Test/review of Vapcell INR21700 5000mAh P2150A (Black-purple) 2021

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.
DSC_4501 DSC_4502
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
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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Renato Azevedo
Last seen: 9 hours 47 min ago
Joined: 06/16/2021 - 09:47
Posts: 71
Location: Brasil

Great review, very detailed
Thank you

Last seen: 2 months 1 week ago
Joined: 05/07/2021 - 10:14
Posts: 60
Location: US

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

HKJ's picture
Last seen: 5 days 4 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7425
Location: Copenhagen, Denmark
GhostJoe wrote:
Is it LR2170SD?

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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Last seen: 1 day 7 hours ago
Joined: 08/03/2018 - 21:03
Posts: 499
Location: United States

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.