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Panasonic NCR18650BM 3200mAh cell's capacity test

Panasonic NCR18650BM is a low drain high capacity Li-ion cell in traditional 18650 format. It's rated at 3180mAh and supports discharging at up to 3.64A.
Panasonic NCR18650BM Li-ion 18650 cell battery discharge capacity test

Tests were done using ZKETECH EBC-A20, which supports up to 20A discharge, 4-wire measurement and is PC-connected.

I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals

I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard current mentioned in its datasheet to charge end voltage (4.2V) (cut-off at 0.1A, which is the lowest supported by EBC-A20). Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 23.5-24.5°C. To be sure in results i've done each test minimum twice (usually 3-4 times). Battery was bought from Queen Battery.

Panasonic NCR18650BM
My cell has the following marking: S NV 6722. It means that the production date is July 22, 2016.
Panasonic NCR18650BM Li-ion 18650 cell battery discharge capacity test

Specifications from Panasonic NCR18650BM datasheet (pdf):
Rated capacity: 2980mAh at 20°C
Minimum capacity: 3030mAh at 25°C
Typical capacity: 3180mAh at 25°C
Nominal voltage: 3.6V
Standard charge current: 0.909A (0.3C)
Max charge current: 3.03A (1C)
Charge end voltage: 4.20V
Charge cut-off current: 60mA (0.02C) (100mA used)
Max continuous discharge current: 3.636A (1.2C)
Discharge cut-off voltage: 2.5V
AC impedance at 1KHz: ≤100mΩ
Max weight: 49.5g

The measured weight of my cell is 47.45g. Measured DCIR at 3030mAh was 26.5±1.5mΩ (in fully charged condition).
Panasonic NCR18650BM Li-ion 18650 cell battery discharge capacity test

Panasonic NCR18650BM capacity test results:
Panasonic NCR18650BM Li-ion 18650 cell battery discharge capacity test
At 0.2C or 0.61A NCR18650BM's capacity was noticeably higher than the 3180mAh declared. Even at it's maximum 3.64A it was 3000mAh. The curves look excellent and i think NCR18650BM is capable to hold much more than 3.64A. Maybe Panasonic limits the max discharge rate to provide good cycle life. Whatever, it's a good low drain high capacity cell.

Here is the video version of this review
Panasonic NCR18650BM Li-ion 18650 cell battery discharge capacity test

Check out my YouTube channel for batteries, chargers and other stuff reviews.

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