[Battery Health] - A way to check real capacity

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frezd91

Senior Member
Aug 15, 2013
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Found this method in a S7 forum and as I can see it's use also for Note8 but no one talked about it for S8.

With a file manager go to root folder

Sys --> class ---> power supply ---> battery

Look for:
fg_cycle (number of charge cycles)
fg_fullcapnom ("real" battery capacity*)

*On devices with Android 7 it should be multiplyed by 2, but as I can see not on Samsung devices

How is your capacity? Is this number reliable?
 
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q123456

Senior Member
Jul 8, 2007
103
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Bartoszyce
Found this method in a S7 forum and as I can see it's use also for Note8 but no one talked about it for S8.

With a file manager go to root folder

Sys --> class ---> power supply ---> battery

Look for:
fg_cycle (number of charge cycles)
fg_fullcapnom ("real" battery capacity*)

*On devices with Android 7 it should be multiplyed by 2, but as I can see not on Samsung devices

How is your capacity? Is this number reliable?
I have 107 cyvles and 2845 capacity. Seems legit - about 5% of wear

Wysłane z mojego SM-G950F przy użyciu Tapatalka
 

cmarius84

New member
Mar 9, 2007
1
0
0
Samsung s7

Battery cycles 358 and 1263....phone will be 2 years in june this year so either the battery is almost dead....or i have to multiply by 2 :)
 

Eduardboon

New member
Mar 11, 2018
1
0
0
Just bought a Galaxy s9+ and it's on 2 cycles with 3331 capacity. Which is around 5 percent down from 3500. Will this get better over time or should I ask for a battery replacement?
 

dagger1

Senior Member
Dec 25, 2015
108
22
0
I bought my S8 on December and according to this I'm on 57 cycles with 2689 capacity. Is that correct?? I would be dissapointed after the company's talk about this phone's battery lasting much longer than S7.
 

SirNamero

Member
Sep 23, 2017
32
13
0
I'm at 2942 capacity (it actually shows 1471 so I'm guessing mine is one you have to multiply by 2?). My cycles only shows 1 though, what's up with that? Lol. Bought it in August.
 

r0k3t

Senior Member
Jan 15, 2017
157
78
28
If this is true, then this sucks.
s8 bought in october.
87 cycles
battery 2725

Edit: My usage is low-to-medium.
 
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hassan1999

Member
Apr 18, 2016
10
0
0
hello you can now check this with phone info . The infomation about the battery health are based on the informations of this files.
But i think that this informations are false too
 

Mako261B

Member
Oct 27, 2015
5
1
0
Battery cycles 358 and 1263....phone will be 2 years in june this year so either the battery is almost dead....or i have to multiply by 2 :)
I don't think you have to multiply capacity by 2 on the s7. Using this method, my S7 says 2535 capacity after 145 cycles. The OEM spec on the S7 battery is 3000 mAh, so I can't imagine the S7 model requires the x2 cofactor.
 

SevenD2

Senior Member
Dec 15, 2011
250
52
58
I have 249 cycles, at 2638 capacity

Bought mine in August 2018

So when Samsung announced the phone they mentioned that the capacity would only drop 5% over two years of use, with what kind of use???
 

oltp

Senior Member
Oct 12, 2005
1,488
23
0
3 cycles only, is this for real? Capacity nom 2951 & capacity 99 (fg_capacity) seems rather ok since I bought the S8 in August 2017.

Somehow I don't really trust the info. fg_cycle was last updated on April 2nd, 2018 & yes I fully charged my Phone a few times the last 4 days. So I don't know what to think about it.
 

matistight

Senior Member
Jun 3, 2010
289
15
38
California
S7 edge- 20 charge cycles,
3,442mAh (if the 2x thing works);
Samsung just replaced this battery a couple months ago, and I used it for a full month after that.

S8 Plus- 0 charge cycles (but there is something that says "battery_cycle" has 107 [on my S7 Edge the file says 22]),
3,412mAh (again, if the 2x thing works, but I doubt it is.)
Used on an off for the last year, definitely should have 60+ charge cycles.

S9 Plus- 13 charge cycles, (but "battery_cycle" says 15)
3,335mAh (clearly the 2x does not apply lol).
I received this on launch date (March 16th I think).


So my S7 edge has dropped 4.4%, while the S8 Plus is 2.5% and the S9 Plus is 4.7%.
Either this is a flawed system or the S9 Plus battery is horrible.

---------- Post added at 08:05 PM ---------- Previous post was at 07:40 PM ----------

capacity 99 (fg_capacity) seems rather ok since I bought the S8 in August 2017.
That just shows what the current capacity of the battery is (percentage) , not the life of the battery.
 
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