HKJ
(HKJ)
October 17, 2021, 11:46am
1
Vapcell INR18650 3400mAh F34 (Green) 2021
Official specifications:
Min capacity: 3300mAh (0.2C discharge)
Nominal voltage: 3.60V
Max Continuous Discharge Current: 10A
Max Discharge Current: 20A
End-of-charge voltage: 4.20V
End-of-discharge Voltage: 2.5V
Weight: 48g ( Appr)
Internal resistance: 24mOhm ( Appr) AC 1kHz
Standard Charge: 1000mA,CCCV 100mA cut-off
Quick Charge Current: 2000mA
This is a high capacity 18650 cell with moderate current capability.
The two cells tracks nicely, they can deliver up to 10A, above there is heat problems.
Conclusion
The cells works nicely, but the internal resistance increases more than usual when the cell is near empty.
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
GhostJoe
(GhostJoe)
October 17, 2021, 5:04pm
2
Thanks a lot HKJ, looks like the cell is a BAK 1N18650CP under the wrap
The BAK 18650 3350mAh 6.5A Battery (N18650CP) is currently in stock and available at 18650 battery store. Bulk discounts are available. All items ship from our Atlanta, GA warehouse for quick delivery within the USA. Grade A, matching voltage, great...
Price: USD 3.99
Sillen
(Sillen)
October 17, 2021, 11:03pm
3
Thanks for the write-up HKJ. Got a couple of these two weeks ago. Tests ok 3337 & 3313 @1A with S4+
beam0
(beam0)
December 28, 2021, 5:21am
4
I’m considering these 20A /10A continuous cells for some medium drain lights, HKJ’s graphs above shows they will provide up to 20A (with heat issues above 10A)… But the BAK 1N18650CP you linked are only rated 6.5A Max, so I’m curious why you say it looks like those under the wrapper?
d_t_a
(d_t_a)
January 21, 2022, 3:14am
5
beam0:
I’m considering these 20A /10A continuous cells for some medium drain lights, HKJ’s graphs above shows they will provide up to 20A (with heat issues above 10A)… But the BAK 1N18650CP you linked are only rated 6.5A Max, so I’m curious why you say it looks like those under the wrapper?
My guess is due to the 5-lobe top design, which is typical for many BAK 18650 batteries.
However, I think the 5-lobe top design might also be used by other manufacturers (I'm not well-versed enough if this is the case).