Turnigy 4s 5Ah Hard Case 20C Lipo, review in the works

[auraslip]

popular may be an understatement. i'm sure most of us have at least one. i... only have four

[JimW]

I think perhaps my question got lost in the shuffle..

auraslip,

Can you tell me the significance of the Red, Yellow and Green on your spreadsheet. I understand that they represent the cell voltage, but what conclusions do you draw from the voltages. Does red indicate a bad cell, or just a low voltage one? How low a voltage would you consider to indicate a bad cell? Or what kind of voltage and discharge curve would you like to see to confirm a good cell.

Sorry for all the newbee questions.

Thanks,
Jim.

[parabellum]

I think perhaps my question got lost in the shuffle..

auraslip,

Can you tell me the significance of the Red, Yellow and Green on your spreadsheet. I understand that they represent the cell voltage, but what conclusions do you draw from the voltages. Does red indicate a bad cell, or just a low voltage one? How low a voltage would you consider to indicate a bad cell? Or what kind of voltage and discharge curve would you like to see to confirm a good cell.

Sorry for all the newbee questions.

Thanks,
Jim.

Those are just randomly taken colors 1 for every cell in 4s pack.

[auraslip]

I think it's a rule set up to show weak (red), not as weak (yellow), and not weak cells (green)

[parabellum]

I think it's a rule set up to show weak (red), not as weak (yellow), and not weak cells (green)

Sure? Then what is this?


Edit. Sorry aura, my bad, he is apparently talking about spreadsheet.

[auraslip]

he's talkking about the spreadsheet at the first or second page

[jana]

I just discharged 3 of these packs in series from 4,1 --> 3,5V and got 4,18Ah from them.

Does this seem about right?

[iovaykind]

That's definitely on the low side..

[jana]

Ok, thanks for answering. I now also tested my 3 other packs and they also put out nearly the same amount of Ah from 4,1v-->3,5v. 4,17AH 188Wh

Is it a way to calculate how much of the full capacity of a battery there should be between to specific cell voltages?
Like 4,15 --> 3,6 should give 85% of max capacity? If that was understandable.

[parabellum]

Ok, thanks for answering. I now also tested my 3 other packs and they also put out nearly the same amount of Ah from 4,1v-->3,5v. 4,17AH 188Wh

Is it a way to calculate how much of the full capacity of a battery there should be between to specific cell voltages?
Like 4,15 --> 3,6 should give 85% of max capacity? If that was understandable.

I think 4,17Ah is about what you get in this SOC span. You probably will get litle more then 5Ah in 4.2v-3v discharge.

[Punx0r]

Agreed. My 5Ah packs all gave 4Ah from 4.1 - 3.65V

[iovaykind]

I must be going from 4.2v to 3.5v and getting over 4.5ah. sorry!