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Installing 28000mAh batt:System ignores actual voltage, when estimating charge level.

29 posts
Thanks Meter: 4
By xdauserr, Junior Member on 22nd August 2014, 07:26 AM
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I attached additional 20000mAh (28000 total) battery directly to the battery of my device (SM-P601).
But it's useless because system shows same speed of battery decline, as if it is on the original battery.
Process is the same even if you connect internal battery to constant voltage source, thus preventing any discharge at all.

When misestimated charge value reaches 0, system goes to sleep mode.

I've already tried the BatteryCalibration app from the market.

I'm on rooted stock rom 4.4.2

Could you please give me an advice to fix battery the charge estimation algorithm or prevent sleep at least.
Last edited by xdauserr; 22nd August 2014 at 07:52 AM. Reason: title
23rd August 2014, 09:24 AM |#2  
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now it's showing 12% with voltage 4066mV
23rd August 2014, 08:38 PM |#3  
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rude solution
I've just found rude solution: to force the device measure the voltage you should detach it completely from the battery for a while.

So turning off/on helps a little bit, but frequency of the operation will rise with charge reaching zero.
23rd August 2014, 10:18 PM |#4  
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How did you attach the extra battery? Can you show what you did

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24th August 2014, 06:28 AM |#5  
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Seconded please show us a picture, even better if you could do a guide.

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25th August 2014, 05:02 AM |#6  
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I have 3 li-po batteries:
2X8000mAh 9mm X 74mm X 135
4000mAh 8.2 48 84mm
but it could be 3X8000 size of the tablet allows it
all are attached with a help of doublesided tape to the back of the tablet, and are covered by plastic protection
I'm not ready to show it, because it's does not have a finished look yet...

so it's 28000mAh in total (could be 32000...)

total weight is 1100g... not for women's hands...

Inside the tablet is two li-po batteries connected in parallel.
So all I had to do is to charge/discharge all of them to equal voltage (+-5mV) and connect together.
25th August 2014, 04:37 PM |#7  
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I assume you have reseted the battery stats?
26th August 2014, 04:44 AM |#8  
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Originally Posted by {Diemex}

I assume you have reseted the battery stats?

Yes, with BatteryCalibration app.
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