[Battery Health] - A way to check real capacity

[frezd91]

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?

 

[q123456]

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]

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]

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?

 

[linom]

This is for rooted users only. OP needs to update the post accordingly.

 

[megh500]

This is for rooted users only. OP needs to update the post accordingly.

im not rooted and im able to check using ES file explorer

 

[dagger1]

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.

 

[linom]

im not rooted and im able to check using ES file explorer

Screenshot please. I am not able to find any 'sys' folder.

Edit- I found it, 181 cycles & 2686 capacity.

 

[chaki-]

It says 3288 here. I bought it August...
88 cycles.

 

[wezzel98765]

297 cycles and 2627mah...genuinely disappointed at the battery loss on such a "young" phone!

Got mine august 2018

 

[SirNamero]

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.

 

[therock3181]

S8+
July 2017

I see 1 cycle only.
Battery at 1704 x 2 = 3408.

I guess it doesn't count/work...

Or I'm pretty lucky !

 

[Deleted member 7998465]

If this is true, then this sucks.
s8 bought in october.
87 cycles
battery 2725

Edit: My usage is low-to-medium.

 

[chaki-]

I wouldn't trust that. Mine says in the folder 3288. So if i multiply it it will be over 6000.
Something's off....

 

[hassan1999]

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

 

[taoshan]

I opened fg_cycle and fg_fullcapnom and it says 0 on both but my phone is 4-5 months

 

[Mako261B]

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]

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]

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]

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.