yashsingh1/xdaforums huggingface dataset:
[Nexus 4 General] brzlian.developer:
I would just like to thank everyone on this topic for the amazing ideas. I added a 2600mha Galaxy S3 battery in parallel (positive to positive, negative to negative) to my original 2100mha battery, and now my Nexus 4 is back to it's amazing self.

I did not wired (soldered) anything, I just used an old USB cable that wasn't working anymore, peeled it, and passed one wire through the positive connector of the old battery, and the other through the negative.

I've got the idea for solving my problem without soldering anything from another topic where a guy charged a Nexus 4 battery using an old micro USB cable:

http://xdaforums.com/nexus-4/general/how-to-bring-nexus-4-battery-dead-t2975391

[IMG="battery connectors"]http://xdaforums.com/attachment.php?attachmentid=3067708&d=1418767306[/IMG]

The wire is very thin, the connector still was able to plug on the phone. Then I made a little hole on the side of the back cover, so that I could pass the wires to the exterior of the phone.

Then I just used duct tape to keep the positive and negative wires "stuck in place" on the battery connector. Used more tape to fix the battery on the back of the phone, and the cut a hole on my silicon case to give space for the external battery.

The phone is now 1/3 thicker than before, it's almost unnoticeable, and the battery life is more than 10 hours with the screen on and heavy use. With normal use, I go more than 24 hours without worrying about charging. I'll try to get some photos later.

Thank you guys for this awesome community.
[Nexus 4 General] pedro_nf:
Some info about batteries

I'm looking for info on how to adapt a bigger battery on my old Nexus 4 and this thread is great.

Just a quick comment about battery connections:

- the battery is charged through the phone by a dedicated electronics chip that is calculated for the original battery capacity, if you change the original battery with a bigger one then it will charge more slowly or sometimes don't even charge correctly because the supplied current is not enough. On low end electronics it can even break the charger circuit. Replacing the original battery with a slightly bigger capacity battery should be ok.

- be careful when connecting two batteries in parallel, at the moment of connecting the wires the battery with more charge will discharge over the battery with less charge (charging it) until both batteries have the same charge. If one of the batteries is almost discharged and the other almost full, then you will have a high current going through the batteries that can be greater then the max charge or discharge current, breaking one or both batteries. For LiIon batteries they can heat up and catch fire. Most of the times the simple fact of connecting batteries in parallel will shorten the batteries life time. So I'd say its better not to do it...

Ho and by the way, the connection in picture on #291 is plain wrong, never connect 5V supply directly to the battery!
[Nexus 4 General] brzlian.developer:
4 batteries

Hi Pedro. For over two months now, I'm using FOUR batteries in parallel on my 2012 Nexus 4. At the moment, it haves a chinese knock off internal battery, and I connected another three Galaxy S4 batteries on the back of my phone. It never got hot or anything, and charges normally. I get over two days of heavy use on a single charge, something like 12 hours of screen time with a high brightness level. It looks like a tank, but I kinf of like it that way. And since I need to always be on the latest Android versions, Cyanogen just released Nougat for the Nexus 4, I can't see myself changing phones anytime soon.

Since according to forum rules I can't post outside links, if you want to see how my phone looks with 3 batteries attached to it's back, go to the link bellow.

http : // imgur.com/a/0Gie2
[Nexus 4 General] shubham.chitriv:
single battery soldered

LG g3 of 3000mah is soldered, but battery backup is still as n4 battery was, is there any modifications required in system files for the new mah battery to work on full power
[Nexus 4 General] pedro_nf:
Nice :)

Well, it is possible to do it and RC cars and planes enthusiasts do it all the time. But you should make sure they are identical batteries, same voltage, same chemistry, same manufacturer, same age. And same voltage when you connect them.

With time, as batteries age differently they will have slightly different capacities so you'll start having cross charge currents between batteries, when they are not connected to the charger. So theoretically parallel batteries will have a smaller life span. But as many things in real life, in practice it'll be just fine ;)
[Nexus 4 General] brzlian.developer:
I used my N4 with 4 batteries for over 6 months, but unfortunatelly I dropped it and the screen got destroyed. So I'm using a Xiaomi Note 3 now. I kept the batteries, maybe I'll attach it to another phone someday.
[Nexus 4 General] shubham.chitriv:
HAve a look at this please

---------- Post added at 04:23 AM ---------- Previous post was at 04:03 AM ----------

Did u made any modifications in system files, if yes what are those???

I attached a lg g3 battery plus original N4 battery but it is giving same battery backup as before
[Nexus 4 General] KitsuneFoxy:
Hearing all this sounds great, is there a anyone eho would offer a prebuilt ready to go kit? With two batteries. I have no solder experience and have tremors. I dont feel like i would be confident otherwise. I can pay however. Being based in the uk might be sn issue, but would love to chat about one ready to plug nd go
[Nexus 4 General] tommmtom:
Where in the UK? Pm me if you want..
[Nexus 4 General] KitsuneFoxy:
In the east Midlands. I have no way to make the case for the two batteries. I know where to get OEM nexus batteries. Its just that case of yours is 3d printed? How much would one cost to make from you?
[Nexus 4 General] androidfoshizzle:
Still no pics
[Nexus 4 General] tommmtom:
It's done....I just have no way to get pics of it until I see my girlfriend and use her phone!

I have a few pics I took of it with the nexus before I fitted it
[Nexus 4 General] michel9501:
you seem to know your way with batteries.

care to look at my problem?

http://xdaforums.com/showthread.php?t=2254329
[Nexus 4 General] Hazmatyre:
Post a tutorial please, we'll love you forever!
[Nexus 4 General] :
pics pics pics..

Please!! Pictures!!!

Amazing!
[Nexus 4 General] tommmtom:
pictures of it on the phone..

and updated battery stats
[Nexus 4 General] tommmtom:
First post is updated :)
[Nexus 4 General] IRX120:
Nice for a DIY battery,

Sent from my Nexus 4 @1.72 GHz on Stock 4.2.2
[Nexus 4 General] m4r0v3r:
this is exactly what I was waiting for, but I love my glass back...sigh
[Nexus 4 General] danguyf:
That's really rad. Awesome hardware hack!
[Nexus 4 General] Johmama:
That's really cool! Might try it sometime. The tutorial was really helpful too. I have one question though. So, the back cover you have on your phone is the original back cover with the glass removed and a pocket for the second battery carved out, or is it a different one? I'm confused because you said your phone is slightly thicker now, which I wouldn't think would be the case if you used the original cover and carved a slot for the other battery.
[Nexus 4 General] PcFish:
OP made a new back cover.
[Nexus 4 General] Underground_XI:
I enjoy 6h20mins with franco kernel + do not live in the jungle where there is no electricity:)
[Nexus 4 General] 75markus:
well done tommmtom :good:
[Nexus 4 General] tommmtom:
Thank you!

Wait until it breaks then you'll hate it... :P then do this mod!!!!!!

Why thank you :P

Cheers! Its the original back with no glass and a piece of plastic that's carved out on top of that, in the place the glass was!!

I would like to see a normal nexus 4 get 6:20h with the same usage I do on my phone ;)

Thank you :D!
[Nexus 4 General] username8611:
haha wow you actually did it and got it working! thats sweet!
[Nexus 4 General] xateeq:
Next step break back glass and do this mod, OP u da man.
[Nexus 4 General] FormerSlacker:
Aren't the antennas for the phone in the back cover? How did you get around that?

EDIT: NM saw first post. :)
[Nexus 4 General] redandwhitearmy:
Wow great finish BTW ... :thumbup:

Sent from my HTC_Flyer_P512_NA
[Nexus 4 General] chrisdzie:
Wow that is awesome. Never will have that on my Xperia play :mad:

Just 12 hours and I have 30%.
[Nexus 4 General] gedel wind:
good job man, but i love my slim sexy smartphone :D
[Nexus 4 General] Ranaquajaro:
Have you ever thought of just putting a completely new battery with more mAh? Maybe that would solve your issues with the percentage. Also if I were you I'd do a battery calibration and see if that fixes it as well
[Nexus 4 General] madmike413:
Sent from my N4 running CM 10.1 M3 and Franco Kernel M2!
[Nexus 4 General] tommmtom:
Yeah that was the plan to start with.. But then there would've been a gap where the original battery was, wasting space! I couldn't find one that would fit in the place of the original that was just fatter :( I've tried everything with the battery readings, but they're still odd.... best thing is to read the voltage and use that as my level :) although I don't really bother about the level anymore as I know whatever I do it's not going to run out :D

Yeah but with the same usage as I do... 85% brightness, 1.836ghz, everything synching, 3G on, WiFi on, calling, texting, whatsapp, chrome, Facebook, 2 hours iPlayer etc....

Proper usage :)
[Nexus 4 General] aresbv2000:
man....you may have 2 days of usage with your phone....but no offence...it looks like s#@4t!!!

i rather charge my phone once a day instead wearing that in my pocket!
[Nexus 4 General] athani:
Sure it looks like **** but he'd smashed his backplate anyway, which looked way more ****ty :)
[Nexus 4 General] aresbv2000:
you can always buy a new one.in my country you can find it an around 40 $.
[Nexus 4 General] ziddey:
What's with all these thread****ters lately?

Nicely done OP. I soldered together two batteries for my last phone (HTC sensation) and saw the same battery percentage behavior in the beginning. It's been a long time and I didn't use the double battery much but it seemed to become linear at some point. Not sure what happened or if I'm misremembering. I'll try to see if I took any screenshots.

:thumbup:
[Nexus 4 General] aresbv2000:
man....watch your language!!!!

i haven`t insulted anybody!

if u want i can start right now...but i`m sure mi IQ is way better than this!so...please watch your language!!!
[Nexus 4 General] ashishv:
Now please stay on topic.And if u dont like this thread/mod,please stay away from this.Peace.:cool:
[Nexus 4 General] m4r0v3r:
what's your usage like indepth? I mean I wake up, text, browse the internet, listen to music constantly for the next two hours atleast, by the time I get to uni my battery is pretty close to dying lol
[Nexus 4 General] xchasa:
Mi IQ. Gold!
[Nexus 4 General] coolnow:
Great topic OP. How's the heat? Does it get uncomfortable, especially since you seem to be overclocking and also using your phone quite a bit more than others, or does the battery work a different way? I mean, do they both discharge at the same time, or does 1 discharge almost fully until the 2nd one takes over?

Anyway, wouldn't it be cool if a company started selling bigger batteries + back case for the Nexus 4? It'd be messy and not for the normal population, but still good for those of us that don't mind hacking but can't solder or don't feel too comfortable with our skills.
[Nexus 4 General] BugXXXy:
lol mine gets 5hrs and 45mins screen time on heavy use ,Sync on, 3G, data on and brightness is at 50% NO GAMES just web surfing and FB when I play games battery will only last 3hrs , 15min LOL don't even need to change the battery but mine is rooted running CM 10.1, Franco kernel and Greenify to save lots of battery :D
[Nexus 4 General] :
Great Idea.

I find myself asking, what are the risks? What could go wrong from having these 2 batteries mounted inside your phone? I saw the question about heat, and that is something I'm interested in as well.

I had an extended battery for my Vibrant and loved it! Phones these days are so slim and streamlined that just reaching into my pocket to pull my phone out required a few turns of the device in my hand to get it lined up right. With the extended battery hump, I knew the orientation of the phone in my pocket and it was just easier for me.

Someone also mentioned 3d printing. Wouldn't that be just great! I looked into it, and there is already companies (and there will be many many many more soon) that will print something for you for a fee. Now, I'm no 3d graphics designer, but I'd chip in to pay someone $10.00 to make a 3d model that can be submitted to these companies. If enough promise to chip in, we could easily hire someone to do this!

While we are on the subject of modding. I looked into adding a microsd card reader, or some other way to add physical storage to this device. Could we maybe incorporate this into the case? imgur dot com/a/iTsAU

One last thing, could you please post pictures of the actual dirty work? The battery attached to the phone, with wireless charging and nfc stuff on top?

Again, thanks for this OP! Love it!!
[Nexus 4 General] zelendel:
You know I see all these posts about how it looks. What it looks like is not important. What it does is all that matters.
[Nexus 4 General] zhuozhi211:
awesome mod! and for DIY, the finishing of the back is really great.

maybe you can package it as a kit and sell it =D
[Nexus 4 General] :
I'm not so big on how it looks as much as the integrity of the device. My last phone had gotten water damaged simply because I pulled it out of my pocket while mowing the lawn on a really hot day. Its important to me that I don't make the same mistake again, so I need to look into all options before I do this mod.

And anyways, 3d printing is hot. Why not take advantage of it while we can? Hell, all we need is one person to make one 3d design and we can all use it over and over and over again.
[Nexus 4 General] BrianDigital:
Lol had nothing to do with this thread lol, and lol to the lol man lol. True nexus warrior lol Holo lol
[Nexus 4 General] dragon_76:
Doesn't anyone make qi cases for the Nexus 4? I've seen portable qi mats...
[Nexus 4 General] imatts:
op u should apply all battery saving techniques such as uv'ing & putting brightness down, turning data off & lowering cpu freq max.

im extremely interested to see the insane usage for these settings!
[Nexus 4 General] CDeviant:
Thanks for those pictures, I guess I'll be the first one to ask though..

Does anyone think ANYTHING like this will ever be available for purchase. I would love to be able to replace the fragile back of the phone with something else..

My perfect back would be TPU material, double battery, and a cover flap like this.

I understand that there's connections, and antenna in the back, so this would drive the price up etc.

I'm almost 100% sure nothing like this will come for the N4 though, I guess it's worth it to stay hopeful.
[Nexus 4 General] aanonymoushuman:
Does anyone know of a battery that is about the size of our nexus 4 battery but has a greater capacity?
[Nexus 4 General] Wowfunhappy:
Wow, I wish I had the skills to do something like this.

Out of curiosity, does/would the wireless charging still work with this?
[Nexus 4 General] :
I'll ask again!

Does anyone think they could make a 3d... I donno, autocad file that we could send to a 3d printer and get a case that would fit over the phone, with the second battery added??
[Nexus 4 General] Yuvin:
Wow, great job OP! That's actually really useful. I may actually do this if my glass back breaks. :P
[Nexus 4 General] danfalcas:
Ugly as hell.. If I can get to home with my phone still on it's a great battery life.
[Nexus 4 General] zelendel:
And your point?
[Nexus 4 General] chrisgtl:
So your two batteries are piggy-backed? Do you not run risk of elevated temperatures when charging and explosion?
[Nexus 4 General] calebloop:
OP, Im sure this has already been mentioned, but have you tried wiping/resetting the battery stats in recovery?
[Nexus 4 General] -JFK-:
I can make a 3D with Solidwork ready to send to 3D printing, but will need your help for the dimensions;)
[Nexus 4 General] :
Ok, I have the battery! Got here rather fast!

The only thing I don't have is a back plate. If anyone has a broken one please let me know. I'll give it a few days and then I'll order one off ebay as soon as I get this check from my client.

I've have a few people who will create the model for us, but the problem is actually getting it printed will be rather costly still. I can see why people were having a hard time, until I made it clear that I was only paying to have the file made.

I'm hoping to swap out the batteries later tonight. Have them both fully charged.

I'm also going to take some detailed photos of the area, and between my roommate, myself and this forum try to determine how or what we can do to make this mod as painless and simple as we can. I think it may be a good idea to seek out an electronics forum and post there.

Once I have the battery hooked up, I'll take very detailed measurements, and photos and post them all here.

I'm not sure what I am going to do about a temporary back just yet. Having to mill something is being placed in the same category as having to solder. Two things the average nexus 4 owner probably will not want to do.

If anyone has any idea's to add to this, please let me know.

I want to thank the OP again, this is amazing and I'm hoping the best for it!

Nick
[Nexus 4 General] FSRBIKER:
I'm wondering if it be a better idea to use a Single extended battery around 3000-3500mAh that is similar in dimensions to fit in the battery location? The 3d back could be a bit smaller, still have a big increase in capacity and eliminate the need for much of the wiring.

Sent from my Nexus 4
[Nexus 4 General] :
Maybe that would solve the problem where the % remaining sits at 30%!

That's something for another day, I've already got the battery!
[Nexus 4 General] FSRBIKER:
Can you post the dimensions of the battery, I'll see if I can find something that could work when I get a chance.

Btw are you from NJ?

Sent from my Nexus 4
[Nexus 4 General] :
Good ol Illinois.

My amature measurments, my roommate will prob do better...

2 7/16th x 2 x 3/16th

[EDIT] In Inches[/EDIT]

You can see a picture of it here :

http://www.techrepublic.com/photos/cracking-open-the-samsung-galaxy-s-iii-t-mobile/6370767?seq=12
[Nexus 4 General] androidfoshizzle:
If somebody can sell the battery+3d printed battery door combo id pay up to $50
[Nexus 4 General] :
My roommate and I have looked at pictures, studied and talked about this for a little bit.

Here is what we came up with. First, there is probably no way we can connect the two batteries without these two batteries being permanently attached. If one goes bad, you have to buy a brand new nexus 4 battery. Per the OP, I think that he will agree.

We don't think you will have to solder 4 wires to connect the NFC - w/charging pads. I thought up of maybe taking a thick piece of rubber in the size of that pad, and screwing/drilling something through the rubber to complete the circuit. I'll try to have some cheesy diagram of what I'm talking about up soon. My roommate things we can maybe..maybe just make a circuit board in place of the foam. In place it between the pads. Either way this is going to be small, and probably really cheap to do.

My whole goal is to do as little modification to the actual device. With the battery perm attached, and the Pads connected without soldering. This can easily be something we make a few dozen of and ship to people.

My roommate did bring up his fear of doing this. He doesn't think anything will go wrong, and that the science is sound. Just...well.. it is a nice phone after all ; ) So please, post your fears, or any ideas of what you think could go wrong and lets plan this out together!

I still haven't decided what I'm going to do about the case, well I guess I mean the back plate. That's ok, I need to figure out a way to get this s3 battery charged first. If anyone has any thoughts on that, please do let me know!

---------- Post added at 01:20 AM ---------- Previous post was at 01:03 AM ----------

Sadly the 3D printed part of it is still a bit expensive. I'm trying to figure out a way to do it with out 3d printing and think the OP has the right idea.
[Nexus 4 General] :
Wiping battery stats doesn't do anything. Just let the battery die, charge and then post results

Sent from my Nexus 4
[Nexus 4 General] ajlunis:
Just wanted to come express my support for this and say that I could help make a Solidworks or Autodesk Inventor CAD file if need be, and that I'd gladly pay 40-60 dollars for the cover, battery, and easy method of installation.
[Nexus 4 General] danyjohn:
heavy and bigger than original.:D
[Nexus 4 General] jose13683:
The phone seems a little bit too "bulky" for my pocket, but you made a really good work!! :thumbup:
[Nexus 4 General] Alicklee:
Could you add a 3rd battery or should that be too big?

Sent from my blazing fast nexus 4 o yeah baby this phone is awesome
[Nexus 4 General] Dark_AJ9:
Sorry but i dont need it ... My nexus 4 stats are.

2d 10h + 5 h screen.
[Nexus 4 General] XupModz:
What do you do just set it on a table and look at at it every 30 mins?
[Nexus 4 General] estallings15:
The rest of us use our phones. Why even post here?
[Nexus 4 General] JCreazy:
Alright, I thought I would chime in. I don't own a Nexus 4 I opted to skip in and wait for the Nexus 5 but since I would be interested in something like this for the Nexus 5, I have been reading about this. I guess the first thing to do is find a battery that is the same dimensions as the Nexus 4 battery (not thickness) so that is will fit in the current slot, second thing to know is how the leads are connected to the battery. Can they easily be removed from the Nexus 4 battery and be soldered onto a different battery. Once you have that figured out comes the 3D modeling, I am not worried too much about that at this point in time because I would like to see a battery worked out that wasn't in parallel and isn't wired to the phone. I am surprised that no company has done something like this because it seems a large part of Nexus 4 users are looking for a longer battery solution.
[Nexus 4 General] PelegK:
Heavy !
[Nexus 4 General] shenery:
Hey. I'm giving this mod a bash with a Note 2 battery. It will give me 5200mah!!

The note 2 is 3.8v the same as the s3 so should work right?

Did you manage to get the phone to read the right battery stats? Someone wrote that there was a system file or something that could of been edited. Just wondering if you've tried anything?

Cheers

Steven

---------- Post added at 12:50 PM ---------- Previous post was at 12:48 PM ----------

Also. Where did you solder the wires to on the battery. Is it the metal clips actually on the phone? One to far left negative and one to far right positive?
[Nexus 4 General] alvinma:
WOW~~~~~~~~~~~
[Nexus 4 General] tommmtom:
Yep that should work :) what are you doing for a back? The note 2 battery is even wider than the s3 so its going to be close with the sides of the nexus!

That was me about the system file....it wouldn't let me change it...but tbh I think with terminal it would be possible to change. I'm going got try again after exams :) at the moment the battery meter isn't too much use, all I know is I'm not going to run out of juice :D

I soldered mine to the connector on the battery...not the phone :) just trim the plastic carefully with a blade and you'll get to some nice gold contacts which you can solder too without obstructing the plug!

Post up some pictures here when you've done it :)

Tom