Sanyo UR18650AA - low drain 2250mAh cell's capacity test

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thunderheart   100 W

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Sanyo UR18650AA - low drain 2250mAh cell's capacity test

Post by thunderheart » Feb 25 2019 5:06pm

Sanyo UR18650AA has neither high capacity nor high maximum discharge rating but it's a relatively low-priced cell which makes it attractive. (Ask suppliers for a pricelist. I'm not a seller)))
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The battery was bought from my reliable supplier (Queen Battery) and tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A.
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I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals
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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 charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 23.0-24.5°C. To be sure in results i've done each test minimum twice (usually 3-4 times).


Sanyo UR18650AA

The cell is marked as SANYO Z UR18650AA V08A.
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The main specifications from Sanyo UR18650AA datasheet:
Rated capacity: 2100mAh at 20°C
Minimum capacity: 2150mAh at 25°C
Typical capacity: 2250mAh at 25°C
Nominal voltage: 3.6V
Standard charge current: 1505mA (0.7C)
Charge end voltage: 4.20V
Charge cut-off current: 43mA (0.02C)
Max. discharge current: 4.3A (2C)
Discharge cut-off voltage: 2.5V
Max weight: 43.1g

The measured DC IR of fully charged cell at 2150mA was 35±2mΩ (measured using EB Tester Software).
My cell's weight was 41.86g
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Capacity test results
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At 0.2C / 0.43A UR18650AA's capacity was slightly higher than 2250mAh declared. At 5A discharge it showed 6mAh higher than 2100mAh. Nothing special to say. Just a good low drain low capacity cell.

Here is the video version of this review:
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Check out my YouTube channel for batteries, chargers and other stuff reviews.
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