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DNA75C - 100% charge off USB


ruckus
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My DNA75C seems to struggle to hit 100% (4.20v) off the USB charger..

I calibrated the battery curve using the battery analyzer yesterday and verified the 100% node is sitting on 4.20v... *

If I charge the battery's off my external charger they seem to hit 4.20v so I'm not sure why the DNA75C is struggling to be honest, the batteries are brand new iJoy 20700's... have barely been through two charge cycles yet.

Is there a setting I'm missing here ? *Does the 100% node in the battery curve even determine the max charge cutoff voltage - if not what does ?

I feel like I'm missing another setting determining the charge cutoff...

 

Cheers guy's

 

Edited by ruckus
Grammar
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The battery curve does not effect the charge cut off, how it charges or discharges, any of the battery protection or anything to do with vape quality it is simply a way to make the battery gauge a bit more accurate.  I wouldn't worry about it, drop the high point by 0.1 V and it will probably read 100% before you take a puff, but the most accurate gauge in the world  always be less than 100% after a puff or three.

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1 minute ago, VapingBad said:

The battery curve does not effect the charge cut off, how it charges or discharges, any of the battery protection or anything to do with vape quality it is simply a way to make the battery gauge a bit more accurate.  I wouldn't worry about it, drop the high point by 0.1 V and it will probably read 100% before you take a puff, but the most accurate gauge in the world  always be less than 100% after a puff or three.

Right, you confirmed what I assumed.

I mean 0.1/0.2v's really isn't a big deal.. just wanted to make sure I wasn't missing something.

Supposedly it's better long term for battery life if you don't charge all the way up to 4.20v's anyway, so I'm not really worried.

Is the charge cutoff voltage something configurable ? Or is it a predetermined value ?

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Year it's just a puff or two and batteries tend to drop from 4.2 fairly fast and could easily be at 4.18 or 19 if you charged them a day or two before, at first that's what the curve is trying to adjust to: faster drop in capacity vs voltage at both ends with most of the capacity in the middle where it more of a straight line.

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