Test/review of Sanyo UR18650ZK 2500mAh (Cyan)

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HKJ
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Test/review of Sanyo UR18650ZK 2500mAh (Cyan)

Sanyo UR18650ZK 2500mAh (Cyan)
DSC_7295
Official specifications:


  • Capacity: 2500mAh
  • Charging current: 1.25A
  • Charging voltage: 4.2V
  • Max discharge current: 5A

Sanyo%20UR18650ZK%202500mAh%20(Cyan)-info
This cell is not a high current cell, in one development plan it said it was for backup and only to be charged to 4.1V
DSC_7293 DSC_7294
DSC_7299 DSC_7300
DSC_7296
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DSC_7298
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-Capacity
It can easily match the 2500mAh specification at least up to 7A current draw.
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-Temp-7.0
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-Temp-10.0
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-CapacityTimeHours
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-CapacityTime
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-Energy
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-PowerLoadTime
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-TripCurrent
Sanyo%20UR18650ZK%202500mAh%20(Cyan)-Charge
Conclusion
The cells looks to be very good quality, but at 4.2V the capacity is not very impressive by today’s standard and it cannot deliver very high current either.
I would love to see a real datasheet for this battery to see if it is a general purpose or a long life with lower charge voltage.
Notes and links
Vapcell told me that I was missing some cells in my comparator and they would be happy to supply them.
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
Compare to 18650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/