10440 Li-ion Test

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FlaCracker

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My CBA II arrived today so I tried it out on a few 10440 cells I had at my desk.

10440400mAConstant.jpg
 
A starting voltage of 4.3 volts is too high. You are probably damaging your cells. They should be charged to a maximum of 4.2 volts. How were these charged?
 
spencer said:
A starting voltage of 4.3 volts is too high. You are probably damaging your cells. They should be charged to a maximum of 4.2 volts. How were these charged?
Click to expand...

I noticed that when I started the first test. I charged them on a Nano I have at work that I don't normally use.
 
:twothumbswell-done.
For our good,We need more tests like that. Thank you!lovecpf
 
spencer said:
A starting voltage of 4.3 volts is too high. You are probably damaging your cells. They should be charged to a maximum of 4.2 volts. How were these charged?
Click to expand...

A starting voltage of genuine 4.3V for sure would be too high.

But the CBA II (at least the specimen they've sold to me, but why should it be different from others?) is not really precise in voltage measurement.

I've just connected a high precision bench supply, set to 4.200V (and in addition measured by means of a DKD calibrated DMM showing 4.2003V) to my CBA II and that apparatus claims to have an input of 4.30V.

So in my opinion the CBA II is quite nice for certain comparisons between similar cells but not for reliable absolute measurements.

Wulf
 
ru sure the 3rd one isnt a 14500? either that or you have some sort of miracle , and if its true, i think i will be doing a Mecca to florida just to see it :-)
 
a few questions

How come final results are always in Ah and not in, say W/h? power takes into account voltage while Ah seemingly leaves voltage out of the equation.

Also, so in a voltsxAmp*hours graph, the best one is the one that goes the farthest to the right? so what does it mean for the UF 10440 that had the highest differential?

Thanks for doing these tests, I'm actually looking for some 10440s soon =)
 
bshanahan14rulz said:
a few questions

How come final results are always in Ah and not in, say W/h? power takes into account voltage while Ah seemingly leaves voltage out of the equation.

Also, so in a voltsxAmp*hours graph, the best one is the one that goes the farthest to the right? so what does it mean for the UF 10440 that had the highest differential?

Thanks for doing these tests, I'm actually looking for some 10440s soon =)
Click to expand...



Because each battery type has its own working voltage range that operates within. It doesn't leave the voltage out of the equation, it's part of the equation.

See this definitions page:
http://www.batteriesplus.com/t-faq2.aspx#10
 
Meterman said:
A starting voltage of genuine 4.3V for sure would be too high.

But the CBA II (at least the specimen they've sold to me, but why should it be different from others?) is not really precise in voltage measurement.

I've just connected a high precision bench supply, set to 4.200V (and in addition measured by means of a DKD calibrated DMM showing 4.2003V) to my CBA II and that apparatus claims to have an input of 4.30V.

So in my opinion the CBA II is quite nice for certain comparisons between similar cells but not for reliable absolute measurements.

Wulf
Click to expand...

That's what's happening here also. I checked the cells with my DMM and they read 4.2v, but the CBA is saying 4.3v. BTW, I noticed after upgrading to the Pro software that with it you can calibrate the voltage reading.

Jimmy
 
Patriot said:
How did we get on the subject of 14500s? This is a test concerning 10440 cells. :thinking:
Click to expand...

oohhhh, :oops: i got it now
is was ultraFire that lists the 600ma LOL , shoulda known.
you see then the confusion, how does a 300ma battery have 600ma ? when its labeled in china :huh:
 
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