Test/review of Kentli AA PH5 3000mWh (Blue)

HKJ

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[size=+3]Kentli AA PH5 3000mWh (Blue)[/size]

DSC_1430.jpg


Official specifications:
  • Voltage: 1.5V
  • Rated capacity: 3000mWh This is energy, not capacity


Kentli%20AA%20PH5%203000mWh%20(Blue)-info.png


This is a LiIon battery with build in buck converter, i.e. it will deliver 1.5V out.



DSC_1431.jpg
DSC_1432.jpg


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There are two connections at the top of the battery, the usually +1.5V and on a ring around that a direct connection to the 3.6V LiIon battery, this connection is used for charging.

DSC_1434.jpg

DSC_1435.jpg

DSC_1436.jpg


Kentli%20AA%20PH5%203000mWh%20(Blue)-Capacity.png


The battery has about 2000mAh, but the capacity goes down above 1A load. There is some difference between the two cells.

Discharge%20capacity%20Kentli%20AA%20PH5%203000mWh%20%28Blue%29.png


Here I tested with low current, the test are made with both batteries, depending on current. The 10mA track took 8 days to test and the capacity is about the same as the 100mA track, i.e. the self discharge is very low.

Kentli%20AA%20PH5%203000mWh%20(Blue)-CapacityTime.png


Kentli%20AA%20PH5%203000mWh%20(Blue)-CapacityTimeHours.png


Kentli%20AA%20PH5%203000mWh%20(Blue)-Energy.png


Kentli%20AA%20PH5%203000mWh%20%28Blue%29%20A%20load%20sweep.png


The battery can deliver about 2.5A before the output voltage drops.

Discharge-Kentli%20AA%20PH5%203000mWh%20%28Blue%29-AA-pulse-1.0%2010%2010-IR.png


LoadOnOff.png


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When turning off a 1A load the output voltage will increase 0.05V, this is fine.

Noise1A.png


NoiseNoLoad.png




[size=+3]Conclusion[/size]

These batteries have 1.5V basically from start to finish, this means they work with equipment that has problems with NiMH voltages. The capacity is in the same range as normal NiMH batteries, but cannot match high capacity NiMH. They require a special charger.



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

This is the second time I look at Kentli batteries, the first time I also looked at the charger and took a battery apart

How is the test done and how to read the charts
Compare to other AA/AAA batteries: Alkaline/NiMH/Lithium
 

HakanC

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Joined
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Location
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Thankyou for the test, it is interesting to see how much better 1.5V LiIon AA batteries are getting
(But the difference between the two tested cells is a little worrying)


This is the second time I look at Kentli batteries

The difference in energy between these batteries and the Kentli batteries you tested earlier looks bigger then expected
3000 / 2800 = +7% but your test shows (about)+20% for the newer batteries (at least for the good cell)

Kentli%20AA%20PH5%203000mWh%20(Blue)-Energy.png




Kentli%20AA%202800mWh%20(Blue)-Energy.png



Glædelig jul og godt nyt år fra Sverige










 
Last edited:

wus

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Jan 9, 2020
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Location
Munich, Germany
Thanks for all your battery testing etc.

This concept of a LiIon with a built-in buck converter is new to me. I would expect the converter to have some losses, i.e. produce some heat. At 2A or more this could in my opinion contribute significantly to heating up the battery.

Did you measure temperature rise during your high current discharges?

Is it possible to use 2 of these in series connection, in a 2 AA device?
 

HKJ

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Joined
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Messages
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Location
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Did you measure temperature rise during your high current discharges?

Is it possible to use 2 of these in series connection, in a 2 AA device?

I did not measure heat, but like other batteries they warms up at high current.

You can use them in series.
 

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