Capacity and self-discharge of batteries «Sanyo UR18650FM» - detailed results

Battery photo


Brand / modelSanyo UR18650FM
Alternative packagings
Date of manufactureN/A
Condition (age)Tested item is used
Unit weight47 gr.
Discharge (1-hour rest)3.84 V
2100 ±1% mAh (≅8.03 W·h)
Discharge (5-day rest)3.83 V
2080 ±1% mAh (≅7.99 W·h)
~0% self-discharge
Discharge (1-month rest)3.84 V
2140 ±1% mAh (≅8.25 W·h)
~0% self-discharge
Date of measurementFeb 2013


These cells were taken apart from a laptop battery, courtesy of SunShine!

It should be noted that these cells in particular are a bit shorter than the other 18650's I've tested - we suspect that the protection IC is not present (since it's not needed in a laptop battery pack, where the battery electronics bears the task of maintaining each cell). The two cells showed very similar performance; the charts and results here reflect one of the two. The other is almost identical.

Test results

Test chart

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