Test/review of Sanyo UR16650ZTA 2500mAh (Magenta)

HKJ

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[size=+3]Sanyo UR16650ZTA 2500mAh (Magenta)[/size]

DSC_6795.jpg


Official specifications:
  • Rated capacity: 2330mAh
  • Minimum capacity : 2380mAh
  • Typical capacity: 2500mAh
  • Nominal voltage. 3.7V
  • Charging voltage: 4.35V
  • Charging current: 1190mA


Test at 4.35V charge voltage

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-info.png


This battery size matches two CR123 batteries in diameter and length, but has lower voltage. In some cases it is a very good replacement.

DSC_6794.jpg


DSC_6796.jpg
DSC_6797.jpg


DSC_6798.jpg

DSC_6799.jpg


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-Capacity.png


The cells match fairly well and can deliver 5A, but not 7A.

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-CapacityTimeHours.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-CapacityTime.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-Energy.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-PowerLoadTime.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-TripCurrent.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.35V-Charge.png




Test at 4.30V charge voltage

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-info.png


Reducing the charge voltage means about 80-100mAh less capacity.

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-Capacity.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-CapacityTimeHours.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-CapacityTime.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-Energy.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-PowerLoadTime.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-TripCurrent.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)%204.3V-Charge.png




Test at 4.20V charge voltage

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-info.png


With a regular 4.20 volt charger the capacity is reduced 260-280mAh.

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-Capacity.png


The cell needs to warm up before it can handle a 5A discharge.

Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-CapacityTimeHours.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-CapacityTime.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-Energy.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-PowerLoadTime.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-TripCurrent.png


Sanyo%20UR16650ZTA%202500mAh%20(Magenta)-Charge.png




[size=+3]Conclusion[/size]

This cell cannot match a 18650 cell, but when the slightly lower diameter is needed it is a good cell.



[size=+3]Notes and links[/size]

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
 

Need a Light?

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Thank you! I've been waiting for this. I love this cell, run it unprotected with a 3.7v xenon p60 and it's light years ahead of my former protected aw 17670. Plus I've always liked the concept of the higher voltage chemistry, whether or not it's practical, it's effective for incandescent use.
 

rjking

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This is a great alternative for 2 CR123 E Series lights on non critical use.
 

Tachead

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Thanks for another great review HKJ👍.

Just to confirm, these have to be charged on the 3.8V voltage switch setting on the Xtar VP2 to achieve a 4.35V termination correct?
 
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ChrisGarrett

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Thanks for another great review HKJ.

Just to confirm, these have to be charged on the 3.8V voltage switch setting on the Xtar VP2 to achieve a 4.35V termination correct?

Correct-o-mundo.

You are using the naked cells, or protected? The latter will only charge up to ~4.20v in most cases, if it has a protection circuit, so just use the 3.6v setting.

Remember to return the switch to the 3.6v setting so you don't muck up charging regular li-ions.

Chris
 

ChrisGarrett

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Sad that its 2500mAh turned out to be lie.

In the graph above, the cell was only charged up to 4.20v, not 4.35 volts. At a 2A draw, it yielded ~1900mAh.

Charge it up to 4.35v and you get a bit more capacity. It's really a 4.35v cell, not a 4.20v cell.

Chris
 
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Tachead

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Correct-o-mundo.

You are using the naked cells, or protected? The latter will only charge up to ~4.20v in most cases, if it has a protection circuit, so just use the 3.6v setting.

Remember to return the switch to the 3.6v setting so you don't muck up charging regular li-ions.

Chris

Ok, thanks Chris I was 99.9% sure but, I wanted to be positive as I have never had to charge 4.35V cells before.

I have both but, unprotected flat tops were what my question was about.

Yes, I will get into the habit of immediately doing it as I remove the charged cells as I am sure trying to charge a 4.2V cell up to 4.35V would end bad lol.

Thanks again for all your help👍.
 

Tachead

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In the graph above, the cell was only charged up to 4.20v, not 4.35 volts. At a 2A draw, it yielded ~1.90v.

Charge it up to 4.35v and you get a bit more capacity. It's really a 4.35v cell, not a 4.20v cell.

Chris

Yes, HKJ even stated that the capacity would be 260-280mAh higher if charged to 4.35V. As far as I know, these are currently the best option for 16650's. The higher voltage helps with some lights supposed to run on 2x primaries too.
 
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Need a Light?

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It's a great cell. I've left mine on several times in an incan Surefire G2 (first and main was a couple months as it was lost), so down to 0V multiple times. It isn't what it used to be but still performs reliably and decently. Fantastic 2xcr123 replacement.
 

vadimax

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It's a great cell. I've left mine on several times in an incan Surefire G2 (first and main was a couple months as it was lost), so down to 0V multiple times. It isn't what it used to be but still performs reliably and decently. Fantastic 2xcr123 replacement.

But it doesn't work reliably for new Surefire lights. Just a comparison:

Fury 2 cell 600 lm — perfect;
E2D Defender 1000 lm — runs at a reduced power, needs 2 CR123a to run full throttle.
 

Tachead

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But it doesn't work reliably for new Surefire lights.

They work perfectly reliably in my lights thus far. As for the lower output(happens with the Tactician too) that's just a product of trying to run a driver designed to run on 6V on 4V. Surefire never designed these lights to run on anything but primaries after all. That's what the DFT models are for.
 
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Need a Light?

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I only own a G2 because I love incandescent and happen to also love plastic lights. It's the perfect balance, giving me a 3 cell alkaline high performance equivalent in a roughly 18650 package. It's great. And when it was pre-abused, I'd charge it to 4.35V before use, and get a nice white light from my Chinese 3.7V P60s. That was why I bought it (along with Sanyo reputation) but it's proven itself way beyond any expectation.
 
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