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Note 7 with Note 8 battery

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donce1991

Member
Mar 8, 2017
34
11
As the title suggest, its possible to put Note 8 battery in our beloved Note 7 :) the capacity is a bit smaller (200 mah less, but still 100 mah more than what gimped Note FE version sports) . Its inspired by similar thread by Mr.Ultimate, he did some testing and modification with s7 battery.

I did some research for compatible batteries:
got my hands on some batteries, so I can post some dimensions (width, cos its the most important one and capacity), so far those are the ones who are not compatible (I got original ones, fake and copies can and most of the time will be a a different size):

s6 46mm 2550 mah
s6 edge 44mm 2600 mah
s6 edge+ 44mm 3000 mah
s7 edge 42mm 3600 mah
s7 Active 40mm 4000 mah
s8 40mm 3000 mah
s8+ 46mm 3500 mah
note edge 40,6mm 3000 mah
note4 41.4mm 3200 mah
note5 42mm 3000 mah

so far only these are compatible:

s7 39mm 3000 mah
note8 39mm 3300 mah

but still there are about 1 mm of width needed (original battery is almost less than 38mm) so you have to either take the tape off the battery and fold its sides or better remove that frame part between battery and motherboard, so because of the size, I did the mechanical modification and put Note 8 battery in my Note 7.

Manufacturers codes for Samsung S7 battery is GH43-04574C, for Note 8 its GH82-15090A, its just a shame they used much wider batteries in S8, S9 and plus models, but they might use narrower battery in upcoming Note 9, so upgrading and getting bigger battery might not be out of question ;)

As far as I could tell the Note 8 battery is the most promising for its size and device line (still Samsung Note series, just newer) so maybe better compatibility too and so I went with it :)

  • For everyone who would like to repeat this process, of course first you need to open your phone. You can look at ifixit.com note7 teardown or youtube for how to open it up and general guidance before you try anything, especially if its your first time opening a glued phone.
  • You need to remove at least the motherboard and the old battery for this modification (better yet, to remove all the components - easier to clean after), then you have to cut that frame part colored in red between battery and motherboard, cos original S7 or Note 8 battery is a tiny bit wider and removing that part gives fit just enough space to either one. You can use the dremel or any other similar tool to grind it off (I don't recommend cutting it, cos it might stress the frame too much and break the screen, but its just my preference). Then I used some black paint to mask exposed parts like here and here (for a closer look), optional, but I think its safer that way.
  • Now then new battery can fit comfy inside, had to bend the flex cable for reference, cos there enough space, also the new battery already comes with its own adhesive strips, if you get a diff battery, you can buy some 3M adhesive or similar double sided tape. What's left now is to remove the controller from the new battery and solder on the controller from the old battery.
  • Because batteries don't like heat the best bet would be to use spot welder, like they do in factories, but that's a bit on the expensive side (unless you do other electronics projects and happen to have one or made DIY one and even then the size of the tabs would be challenge too). So more realistic option would be to use soldering iron and some solder with flux, but because battery tabs are aluminum just any soldering flux won't work, because solder just wont stick properly and wont make permanent connection, which can add some resistance or even make a loose connection over time. So you must use specific soldering flux which eats into battery tabs and makes perfect connection. I tried few generic flux types I had on hand and basically ruined the endings of the tabs cos the solder just wouldn't stick to it, so I got some cheap zinc flux from local shop and it worked perfectly even using the same solder. After that you can use isopropyl alcohol to remove the remaining flux off the tabs, just don't short the battery. ;)

Some pointers:

  • Try to get original battery, fake or low quality crap from ebay wont cut it, not only because of lower capacity (there are no chinesium batteries who can beat Samsung in battery capacity in same size, period) but because of quick charging too (you shouldn't risk fixing Samsung fire hazard with your own DIY hazard).
  • MUST use battery controller from original battery, using other controller can and will produce some problems, the controller itself doesn't measure capacity, only voltage, so diff capacity doesn't matter, but diff controller wont "talk" with the phone properly, only using Note 7 controller the phone can charge from 0 to 100% and give full incremental readings and battery charging application actually see the right capacity (about 3300 mahs in Note 8 battery case).
  • Solder the old Note 7 battery controller directly to new battery tabs, using wires, extensions, etc could add some resistance to connection and you won't get correct battery readings or end up with crappy or slower charging or worse.

I did tried using Note 8 battery without Note 7 controller, even had to make some DIY connectors. The Note 8 battery connector is the same as the one on Note 7 motherboard so even not taking into account different flex cable length and form, you cant just psychically plug Note 8 battery to Note 7 motherboard. So I took some connectors from dead Samsung S6 motherboards and frankensteined them to flex cable and with some wires I got this and this, thus I could use new the battery without any disassembly or soldering directly (to the battery) just by plugin it with DIY inter connector. It looked all good and tidy inside, that outlined area is there the old flex cable was routed (for reference then closing the phone), but it didn't worked properly, I got crappy indication when charging/discharging, the phone couldn't properly detect exact percentage when charging, like, it could sit on 5% for half an hour, when jumps straight to about 80%, or go gradually to about 30-35 and jump to about 70-80 and just sit there and if rebooted it would go to 99% and so on. Also the official wireless battery cover didn't worked properly too.

As for software side I did jumped for a few weeks through diff roms to find the best one for me (Marshmallow based ones works great, but for some you need diff kernel because of charging cap, while Nougat roms are newer, but can be less stable, lack iris support and official covers, that you can get really cheaply, doesn't work too). So I ended up using original Note 7 Marshmallow rom (the one with 30% charging cap) and hydra kernel version 1.3.5, had to extract this version from hydra rom , cos you can separately download only 1.3 version (from here), recovery twrp 3.1, rooted with SuperSU 2.82 and with Europe Multi-CSC selection from CSC Selection. Of course I still get that nagging notification every time I charge the phone, but its a small nuisance. Also removed some bloatware with No Bloat Free app to make it snappier.

So far it works great for me as everyday driver. I charge the the phone on average every two days, it takes less than two hours on average to charge (I try not to use fast charging much) and its holding about same or even better than my old rooted Note 4 (n910c) with new battery. SOT is great (like more than half a day on wifi playing youtube, ect), (SOT time, usage, by apps. After using the phone for a few months I get average charging/discharging and usage time like this). Of course the system or other apps won't detect the exact capacity because they take the capacity from the model information not from measurements, so because the model is n930f, the system reports original hard coded Note 7 capacity of 3500 mah, but because I used BuildProp Editor app to change the model to n935f other apps shows 3200 mah (like it should for Note FE model), while only battery measuring apps like Accu​Battery report actual 3300 mah (estimated capacity is measured, designed capacity can be changed manually, by default it would show 3200 mah) capacity.
 
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Asem123456

Member
Dec 4, 2017
9
0
Perfect, you are amazing man
I liked your ridh illustration i already do modification with s7 battery and thing good
But i found that charging speed is low however im using original charger and cable so
what do you think the problem is ??
And do you think that note 8 battery is far better than s7 battery ??
Thanks in advance
 

donce1991

Member
Mar 8, 2017
34
11
Perfect, you are amazing man
I liked your ridh illustration i already do modification with s7 battery and thing good
But i found that charging speed is low however im using original charger and cable so
what do you think the problem is ??
And do you think that note 8 battery is far better than s7 battery ??
Thanks in advance

glad to hear somebody founds it interesting and that there are more note7 fans :D

your slow charging speed could be from using low quality battery, most batteries you can find on ebay are fake ones (crappy charging circuit or lower quality and lower capacity or both), also depends on the rom and especially on the kernel you using, i found the hydra kernel being the best with charging speeds. As for note8 battery, its better mostly because its newer and bigger in capacity compared to s7 (3000 vs 3300 mah) and because of the almost identical price i could get them so because if you use real original s7 or note8 battery you have to modify the internal frame for either one to fit why not go with bigger one ;)
 
Last edited:

Asem123456

Member
Dec 4, 2017
9
0
glad to hear somebody founds it interesting and that there are more note7 fans :D

as for your slow charging speed it could be from using low audibility battery, most batteries you can find on like eBay are fake ones (crappy charging circuit or lower quality and lower capacity battery cell or both), also depends on the rom and especially on the kernel you using, i found the hydra kernel still being best with charging speeds

note8 battery is better mostly because its newer and bigger in size (3000 vs 3300 mah) also because of the almost identical price i could them and because if you use real original s7 or note8 battery you have to modify the internal frame for either one to fit so why not go with bigger one ;)

Im using original s7 battery i assembly it from an original s7.
Regarding to charge speed i tried (Note FE ROM) and (Hydra rom), charge speed still the same
Do you think that problem related to quality of soldering paste !!
BTW you saved my ass when you mentioned note 8 battery
i was about buying new note FE battery with 92 $ ,, and now i can buy original note 8 battery with 24 $
Anyway i atill want a tip how to make note 8 battery thiner without do modification to Note 7 frame ??
•Do you have any idea ?
+•How much time your phone takes to full charge ?
 

donce1991

Member
Mar 8, 2017
34
11
Im using original s7 battery i assembly it from an original s7.
Regarding to charge speed i tried (Note FE ROM) and (Hydra rom), charge speed still the same
Do you think that problem related to quality of soldering paste !!
BTW you saved my ass when you mentioned note 8 battery
i was about buying new note FE battery with 92 $ ,, and now i can buy original note 8 battery with 24 $
Anyway i atill want a tip how to make note 8 battery thiner without do modification to Note 7 frame ??
•Do you have any idea ?
+•How much time your phone takes to full charge ?

soldering shouldn't make a big diff, basically if its works you probably soldered it correctly, otherwise you would have some fire on your hands ;) as for note8 battery its thin enough, if you mean width, then you could try to wiggle it in, i didn't took a chance and made a modification, cos even if you manage to put it in inside it would be way more crammed than the original battery was, so a bit dangerous, as for charging, mine takes less than two hours (i try not to use fast charging much)
 
Last edited:

numerozero

New member
Jul 8, 2008
4
0
Samsung Galaxy Note 7
I've got my brand new Note 7 blocked by Samsung for almost 6 months, and change battery for the S7 version and Hydra Rom.
So far everything, I mean everything is working perfect! Iris, fingerprint, cameras, great sound and was able to install any app that I need so far. S-pen works great and if I charge 100% during the night (mobile data and wifi off, phone on) here's my day for test proposal:
7.00 am disconnect from mains and start wifi until 12:00 (several apps running, facebook , whatsapp, viber, phone calls and sms among others)
12:00 until 15:00 out of office mobile data on, wifi off.
15:00 until 19:00 wifi
19:00 until 00:00 wifi at home, games, facebook and whatever...
00:00 mobile data off, wifi off, phone on, don't charge.
7:00 same routine.
At 11:30, 12:00 it's at 10% battery.

So with the S7 battery on my Note 7 and Hydra I can get at least 20 hours regular use and 14 hours in standby.

I'm very pleased with this solution, I'm not an Adroid Update Maniac so this solution appears to be perfect to me.
 

tudgirl

New member
Sep 28, 2017
4
0
Some help over here

How did you make that diy connector? Can u please make a more explained thread. Thanks in advance!
 
Last edited:

donce1991

Member
Mar 8, 2017
34
11
I'm from romania so i was not expecting to find something original to be found online in my area. So i look up on american sites, but i still couldn't manage to find one thats actually original.

you looking for a part number GH82-15090A, it likely gonna cost you at least 20 euros, you could try ordering from some suppliers in europe like https://www.replacebase.co.uk/for-samsung-galaxy-note-8-replacement-battery-eb-bn950abe-3000mah-oem/ or https://www.samparts.eu/en/Samsung-GH82-15090A, or https://www.sparessamsung.com/gb/ba...5090a.html?search_query=GH82-15090A&results=1
 
Last edited:

donce1991

Member
Mar 8, 2017
34
11
How did you make that diy connector? Can u please make a more explained thread. Thanks in advance!

i used some random flex cable i had laying around and a few matching connectors salvaged from dead motherboards, but as i pointed out i did that before resoldering old battery controller on the new battery and using that connector proved to be no good cos it didn't charged well and showed inaccurate capacity, etc., so i wouldn't recommend going that way
 

tudgirl

New member
Sep 28, 2017
4
0
I don't have the note 7 battery controller

Someone had been using it ever since it got released, and 2 weeks ago his battery got bigger and had to remove it. He threw it all away. He gave the note 7 without the battery, thinking I could play around with it. Soy only chance of making this phone work again is if I use a note 8 battery.
 

donce1991

Member
Mar 8, 2017
34
11
Someone had been using it ever since it got released, and 2 weeks ago his battery got bigger and had to remove it. He threw it all away. He gave the note 7 without the battery, thinking I could play around with it. Soy only chance of making this phone work again is if I use a note 8 battery.

you could try searching on ebay or other sites then to find a fake or used battery, cos using diff battery with diff controller will yield various problems, like not charging properly, reporting inaccurate capacity (so it would shut down randomly) and so on
 

tudgirl

New member
Sep 28, 2017
4
0
Some help over here

I have found a dude how sells authentic note 7 batteries for 50€, is it worth it? Long story short, I need a note 7 controller.
 

superkapitan82

New member
Feb 7, 2014
4
0
Thank you for your instruction.

What about the batteries thickness? Isn't Note8 or S7 batteries are more thick than Note7 case?

And I wonder if it's possible to use S9 or Note9 batteries now. Can someone tell?
 
Last edited:

donce1991

Member
Mar 8, 2017
34
11
Thank you for your instruction.

What about the batteries thickness? Isn't Note8 or S7 batteries are more thick than Note7 case?

And I wonder if it's possible to use S9 or Note9 batteries now. Can someone tell?

Note8 or S7 OEM batteries are the same thickness as note7 (aftermarket chinesium ones can differ though), as for s9 or note9 batteries, those are considerably bigger in size, like shorter but much wider and so not usable in note7
 

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  • 1
    As the title suggest, its possible to put Note 8 battery in our beloved Note 7 :) the capacity is a bit smaller (200 mah less, but still 100 mah more than what gimped Note FE version sports) . Its inspired by similar thread by Mr.Ultimate, he did some testing and modification with s7 battery.

    I did some research for compatible batteries:
    got my hands on some batteries, so I can post some dimensions (width, cos its the most important one and capacity), so far those are the ones who are not compatible (I got original ones, fake and copies can and most of the time will be a a different size):

    s6 46mm 2550 mah
    s6 edge 44mm 2600 mah
    s6 edge+ 44mm 3000 mah
    s7 edge 42mm 3600 mah
    s7 Active 40mm 4000 mah
    s8 40mm 3000 mah
    s8+ 46mm 3500 mah
    note edge 40,6mm 3000 mah
    note4 41.4mm 3200 mah
    note5 42mm 3000 mah

    so far only these are compatible:

    s7 39mm 3000 mah
    note8 39mm 3300 mah

    but still there are about 1 mm of width needed (original battery is almost less than 38mm) so you have to either take the tape off the battery and fold its sides or better remove that frame part between battery and motherboard, so because of the size, I did the mechanical modification and put Note 8 battery in my Note 7.

    Manufacturers codes for Samsung S7 battery is GH43-04574C, for Note 8 its GH82-15090A, its just a shame they used much wider batteries in S8, S9 and plus models, but they might use narrower battery in upcoming Note 9, so upgrading and getting bigger battery might not be out of question ;)

    As far as I could tell the Note 8 battery is the most promising for its size and device line (still Samsung Note series, just newer) so maybe better compatibility too and so I went with it :)

    • For everyone who would like to repeat this process, of course first you need to open your phone. You can look at ifixit.com note7 teardown or youtube for how to open it up and general guidance before you try anything, especially if its your first time opening a glued phone.
    • You need to remove at least the motherboard and the old battery for this modification (better yet, to remove all the components - easier to clean after), then you have to cut that frame part colored in red between battery and motherboard, cos original S7 or Note 8 battery is a tiny bit wider and removing that part gives fit just enough space to either one. You can use the dremel or any other similar tool to grind it off (I don't recommend cutting it, cos it might stress the frame too much and break the screen, but its just my preference). Then I used some black paint to mask exposed parts like here and here (for a closer look), optional, but I think its safer that way.
    • Now then new battery can fit comfy inside, had to bend the flex cable for reference, cos there enough space, also the new battery already comes with its own adhesive strips, if you get a diff battery, you can buy some 3M adhesive or similar double sided tape. What's left now is to remove the controller from the new battery and solder on the controller from the old battery.
    • Because batteries don't like heat the best bet would be to use spot welder, like they do in factories, but that's a bit on the expensive side (unless you do other electronics projects and happen to have one or made DIY one and even then the size of the tabs would be challenge too). So more realistic option would be to use soldering iron and some solder with flux, but because battery tabs are aluminum just any soldering flux won't work, because solder just wont stick properly and wont make permanent connection, which can add some resistance or even make a loose connection over time. So you must use specific soldering flux which eats into battery tabs and makes perfect connection. I tried few generic flux types I had on hand and basically ruined the endings of the tabs cos the solder just wouldn't stick to it, so I got some cheap zinc flux from local shop and it worked perfectly even using the same solder. After that you can use isopropyl alcohol to remove the remaining flux off the tabs, just don't short the battery. ;)

    Some pointers:

    • Try to get original battery, fake or low quality crap from ebay wont cut it, not only because of lower capacity (there are no chinesium batteries who can beat Samsung in battery capacity in same size, period) but because of quick charging too (you shouldn't risk fixing Samsung fire hazard with your own DIY hazard).
    • MUST use battery controller from original battery, using other controller can and will produce some problems, the controller itself doesn't measure capacity, only voltage, so diff capacity doesn't matter, but diff controller wont "talk" with the phone properly, only using Note 7 controller the phone can charge from 0 to 100% and give full incremental readings and battery charging application actually see the right capacity (about 3300 mahs in Note 8 battery case).
    • Solder the old Note 7 battery controller directly to new battery tabs, using wires, extensions, etc could add some resistance to connection and you won't get correct battery readings or end up with crappy or slower charging or worse.

    I did tried using Note 8 battery without Note 7 controller, even had to make some DIY connectors. The Note 8 battery connector is the same as the one on Note 7 motherboard so even not taking into account different flex cable length and form, you cant just psychically plug Note 8 battery to Note 7 motherboard. So I took some connectors from dead Samsung S6 motherboards and frankensteined them to flex cable and with some wires I got this and this, thus I could use new the battery without any disassembly or soldering directly (to the battery) just by plugin it with DIY inter connector. It looked all good and tidy inside, that outlined area is there the old flex cable was routed (for reference then closing the phone), but it didn't worked properly, I got crappy indication when charging/discharging, the phone couldn't properly detect exact percentage when charging, like, it could sit on 5% for half an hour, when jumps straight to about 80%, or go gradually to about 30-35 and jump to about 70-80 and just sit there and if rebooted it would go to 99% and so on. Also the official wireless battery cover didn't worked properly too.

    As for software side I did jumped for a few weeks through diff roms to find the best one for me (Marshmallow based ones works great, but for some you need diff kernel because of charging cap, while Nougat roms are newer, but can be less stable, lack iris support and official covers, that you can get really cheaply, doesn't work too). So I ended up using original Note 7 Marshmallow rom (the one with 30% charging cap) and hydra kernel version 1.3.5, had to extract this version from hydra rom , cos you can separately download only 1.3 version (from here), recovery twrp 3.1, rooted with SuperSU 2.82 and with Europe Multi-CSC selection from CSC Selection. Of course I still get that nagging notification every time I charge the phone, but its a small nuisance. Also removed some bloatware with No Bloat Free app to make it snappier.

    So far it works great for me as everyday driver. I charge the the phone on average every two days, it takes less than two hours on average to charge (I try not to use fast charging much) and its holding about same or even better than my old rooted Note 4 (n910c) with new battery. SOT is great (like more than half a day on wifi playing youtube, ect), (SOT time, usage, by apps. After using the phone for a few months I get average charging/discharging and usage time like this). Of course the system or other apps won't detect the exact capacity because they take the capacity from the model information not from measurements, so because the model is n930f, the system reports original hard coded Note 7 capacity of 3500 mah, but because I used BuildProp Editor app to change the model to n935f other apps shows 3200 mah (like it should for Note FE model), while only battery measuring apps like Accu​Battery report actual 3300 mah (estimated capacity is measured, designed capacity can be changed manually, by default it would show 3200 mah) capacity.
    1
    Why are the Note FE batteries so hard to come by?
    1
    i have a note 7 with note fe battery in it. bought the battery long ago on ebay. it was from a korean note fe. fits perfectly and works perfectly.

    i am looking for new battery also. family member who used my note 7 abused the battery so the battery life decreased. but the batterycworks fine just not as brand new

    You're EXTREMELY lucky then! I feel like I'm gonna have to buy a whole FE to get a battery honestly!
    1
    Hi. I have a note 8 battery but the problem is that I don't know how to cut the frame part colored in red between battery and motherboard.

    Hey, i used a dremel like tool to cut and grind it off, any similar tool that gives enough precision would suffice