Test/review of Vapcell INR18650 2100mAh (Purple) 2018

Vapcell INR18650 2100mAh (Purple) 2018

Official specifications:

  • Model: INR18650

  • Size: 18.3*65.2mm

  • Nominal voltage: 3.6V

  • End-of-charge voltage: 4.20V

  • End-of-discharge Voltage: 2.50V

  • Typical Capacity: 2100mAh (0.2C discharge)

  • Min capacity: 2000mAh (0.2C discharge)

  • Weight: Max:46g

  • Internal resistance: Max:13mOhm

  • Standard Charge: 2000mA,CCCV 100mA cut-off

  • Charging Time: 2hours(standard charge)

  • Quick Charge Current: 4000mA

  • Max Continuous Discharge Current: 20000mA

  • Operating Temperature: Charging: 0°C ~ 45°C, Discharging: –20°C~70°C

  • Storage: Temperature –5°C~35°C, Humidity <75%RH

  • Standard environmental condition: Temperature: 23±5°C

  • Humidity: 45-75%RH

This is a low capacity high current battery.

The discharge curves looks good, they track fairly well and capacity is fairly constant independent of load.

Even at 30A the cell do not get too hot, probably because the discharge time is fairly short.


This is a good high current battery, but from an older design with less capacity.

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
Compare to 18650 and other batteries

Well, the capacity is REALLY low for 2018. Maybe somebody will find it to be a useful cell.

EDIT: I just looked at this cell in the comparator next to top cells that are popular around here. This cell holds it’s own, especially at the 30A test!

May be OK, but the 2400 mAh variant is simply better.

Thanks HKJ!

Not many people know it, but it is a particular cell from Sony / Murata under rewrap VapCell Purple INR18650 2100mAh 25A, it is the Sony US18650VTC4A, Yes I said “VTC4A”, simply an improved version of good old VTC4 that was starting to become really obsolete, for improvements: better internal resistance, lower 1~2milliOhms average compared to VTC4, the latest Sony US18650VTC4A cells that I tested a few days ago had an average internal resistance of 10.75milliOhms, then there is also the increase of the maximum discharge which goes from 20A to 25A continuously, then from 30A to 35A continuously if the temperature of the cell remains lower than 80 ° Celsius. I put pictures of my VTC4A cells when there are still skeptics or even people who dare to call me a liar …

Add: Especially since it is not very expensive, the netshop where I bought them are the following prices: the VTC4A cost 5.20usd / pc and they also offer VTC5D at 6.00usd / pc, very good prices these types of cells.