Vapcell INR18650 3000mAh N1830A (Cyan) 2020



Official specifications:

• Nominal voltage: 3.60V
• End-of-charge voltage: 4.20V
• End-of-discharge voltage: 2.50V
• Typical capacity: 3000mAh
• Minimum capacity: 2950mAh
• Internal resistance Max. 23mOhm @ 1kHz
• Standard charge: 1500mAh, CCCV, 100mA cut-off
• Quick charge: 4000mAh, CCCV, 100mA cut-off
• Max. continuous discharge: 15A
• Over charge protection: 4.25V +0.05V -0V
• Over discharge protection: 2.50V +0B - 0.05V
• Over current protection: 17A ~ 20A

Protected 18650 from Vapcell, these are fairly high current, especially for protected batteries.











The two cells tracks nicely and can easily deliver 10A, at 15A they get hot and the protection will trip after some time.















This test only goes to 15A, this is not enough to trip the protection in a short test.





Here I increased the current at 0.1A each second, and after 198 seconds the over current protection tripped.



Stepping the current faster (0.5A/second), means less discharge and the battery do not get as hot, this means the current limit will be higher.




Conclusion

The batteries looks good, but the over current protection is a bit on the high side and this means the protection circuit can get rather hot.



Notes and links

The batteries was supplied by Vapcell for review.

The spikes in the curves was due to a damaged battery holder. The batteries melted it, before my temperature cut-out activated.

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