iPhone 4 Battery Replacement

Featured Guide

Featured Guide

This guide has been found to be exceptionally cool by the iFixit staff.

Replace the battery on your iPhone 4.

Luckily, replacing the battery on the iPhone 4 requires minimal disassembly.

Buy these parts and tools
Tools (continued)
Relevant Parts
Image #1

Edit Step 1 Rear Panel  ¶ 

  • Before disassembling your iPhone, be sure it is powered off.

  • Your iPhone 4 rear cover may have either two #000 Phillips screws or Apple's 5-Point "Pentalobe" screws (second image). Check which screws you have, and ensure you also have the correct screwdriver in order to remove them.

  • Remove the two 3.6 mm Pentalobe or Phillips #000 screws next to the dock connector.

  • During reassembly, we recommend you replace the 5-point screws with equivalent Phillips screws. Our Liberation Kit provides the tools and screws needed to replace the Pentalobe screws with Phillips screws.

  • The 5-Point Screwdriver should only be used once, as it has the potential to strip the screws.

Image #1

Edit Step 2  ¶ 

  • Push the rear panel toward the top edge of the iPhone.

  • The panel will move about 2 mm.

Image #1

Edit Step 3  ¶ 

  • Pinch the rear panel with your fingers and lift it away from the iPhone. Alternatively, use a Small Suction Cup .

  • Be careful not to damage the plastic clips attached to the rear panel.

  • If you are installing a new rear panel, be sure to remove the plastic protective sticker from the inside of the camera lens and the sticker from the large black area near the lens.

Image #1

Edit Step 4 Battery  ¶ 

  • Remove the single 2.5 mm Phillips screw securing the battery connector to the logic board.

    • Some devices may have two screws, one of which holds down the contact pad which is located above the screw indicated in red in the photo.

Image #1

Edit Step 5  ¶ 

  • Use a plastic opening tool to gently pry the battery connector up from its socket on the logic board.

  • Be very careful to only pry up on the battery connector and not the socket on the logic board. If you pry up on the logic board socket, you may break it entirely.

  • Remove the metal clip covering the antenna connector.

Image #1

Edit Step 6  ¶ 

  • Use the clear plastic pull tab to gently lift the battery out of the iPhone.

  • Do not remove the plastic tab from the iPhone.

  • You may need to use a plastic opening tool to loosen the adhesive under the battery.

  • Remove the contact clip from the iPhone.

  • Before reconnecting the battery connector, be sure the contact clip (shown in red) is properly positioned next to the battery connector.

  • Before reassembly, be sure to clean all metal-to-metal contact points on the pressure contact as well as its contact point on the rear panel with a de-greaser such as windex. The oils on your fingers have the potential to cause wireless interference issues.

To reassemble your device, follow these instructions in reverse order.

For more information, check out the iPhone 4 device page.

Required Tools

Phillips #00 Screwdriver

$5.95 · 50+ In stock

Plastic Opening Tools

$2.95 · 50+ In stock

Phillips #000 Screwdriver

$5.95 · 50+ In stock

Recommended Tools

Universal Drive Adapter

$29.95 · 50+ In stock

iFixit Lock Pick Set

$29.95 · 50+ In stock

Inspection Scope

$39.95 · 50+ In stock

Frictionless Ratchet

$24.95 · 50+ In stock

Portable Anti-Static Mat

$34.95 · 42 In stock

Popular Device Products

SIM Card Eject Tool

$2.95 · 50+ In stock

iPhone 4 Replacement Battery

$19.95 · 22 In stock

iPhone 4 Rear Glass Panel (GSM/AT&T)

$14.95 · 50+ In stock

iPhone 4 Display Assembly (GSM/AT&T)

$64.95 · 21 In stock

iPhone 4 Home Button Assembly

$14.95 · 50+ In stock

Comments Comments are onturn off

I used "flat" 1mm screwdriver instead of 5-Point one with success.

jacek, · Reply

When I put the battery in, the lead going from the battery to the plug was fully extended. You need to fold it back on itself - look at the shape of the battery you just removed.

Unfortunately, I didn't realize this until AFTER I clipped the new battery in. I tried to align the battery to where it should go while it was still connected, in the process I broke one of the soldered connections on the battery connector. Wouldn't boot up and did the continuous battery recycling.

Luckily, I was able to put the old battery back in and all was working again. I don't think I'll attempt a new battery at this point...

jradi72, · Reply

Hugely disappointed. iFixit sends me a battery that has corrosion on it with a black X marked on the clip, looks like it is used? And don't even mention this small part, or the folding over. C'mon iFixit you've done great stuff this is not one of them.

dprossi, · Reply

Now that I put my old battery back in, my phone turns on but won't charge. Great. I have 68% until I have a dead phone, no battery. The battery I got from ifixit was a dud. This is a complex process--I've changed out displays on a laptop, hard drives, cpus. This is NOT a "moderate" job and needs major rework on their tips.

dprossi, · Reply

sir I am selina ,I konw maybe the battery quality is not good .

What's you battery capacity?

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If you have some problems you can send message to me.


Beware, watch the video, there is a antenna cover/clip that pops out easily when you remove the inside screw and has to be replaced. This was quickly mentioned in the video but NOT mentioned in the guide. Also I stripped every screw I removed/replaced, the #00 screw driver doesn't work to well and I had the original philips screws, not the pentalope screws. Also, the read all the other comments, I wish I had known the battery cable wasn't pre-bent...its tricky doing yourself.

Be careful is my word of advice and have tweezers around too!

cdthacker, · Reply

This took much longer than the expected 10 mins. The guide made no mention that the battery cable wasn't pre-bent, and I almost bent the cable at the wrong angle to make it fit during several attempts. I tried to re-start the phone several times without success before finally making the new battery work properly.

flightjh, · Reply

The battery change worked without any problems.

My replacement battery connector cable was pre bent so that was not any issue for me.

I am glad that I read the comment about the antenna clip.

As everyone else I needed to use a lot of force to pry the battery loose, take your time and don't rush that part of the job.

Henrik Persson, · Reply

You guys rock! Thanks so much for taking the time to make this video!

Marilyn, · Reply

wait a moment ,maybe it will get well


1) The screws are very easy to strip. Use a magnifying glass to examine the heads and make sure the screw is actually turning. If you do strip the screw, you may still be able to remove it using a 1 mm flat screwdriver. NB the screwdriver sold on the ifixit site worked well for me removing the two screws that hold the case together, and failed utterly removing the screw that holds the battery clip in.

2) clean the pressure contacts on both the new battery and the phone using windex or rubbing alcohol and a q-tip. Make sure not to leave any cotton fiber behind.

3) The battery ifixit sent me had literally zero charge, and as a consequence it looked like the phone wasn't working. The screen was black and would only wake up when plugged in to the wall. This caused me lots of anguish and I ended up putting the phone together and taking it apart again three or four times. But once I let the new battery charge for 30 minutes it came to life and was fine.

glen, · Reply

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selina, · Reply

Very easy to do, thank you!!


vcadario, · Reply

Successful installation.

STEP 4: When removing the battery connector screw, I had to use heavy downward pressure because of heavy thread-lock applied to the screw during initial assembly. Battery supplied contained ~33% charge, which is normal for new batteries.

Phone powered up immediately when plugged in and is charging. Barring the new battery turning out to be somehow defective, this install was a complete success.

bwhoback, · Reply

Followed instructions to a T. New battery would cause reboots and CRC errors in the logs every 3 minutes or so.

Turns out the battery I got on eBay for this is defective as it would not charge. After replacing it back with the original Apple battery, no more reboots. I noticed the new battery was not charging as there is no lightning icon in the battery bar on the iPhone 4 screen when it was plugged into the adapter, it only showed that it was plugged in. The original battery has a lightning bolt icon in the battery bar, indicating it's charging when plugged in.

Thanks iFixit! Great instructions! Too bad my replacement battery from eBay does not work...

Matt, · Reply

This was my first iPhone repair. I was too cautious with the battery connector and spent longer than most would have fidgeting with it. The pressure sensor kept popping up a bit as I worked on the connector, and I wasn't sure if that was part of the tab I was supposed to leave alone. When I did get the battery out (I had to pry it out with one of the plastic shims) the pressure sensor went with it and for a moment I thought I had just destroyed this phone. Fortunately I replaced it and set the new battery, and the phone booted.

oahazmatt, · Reply

Ich habe die Batterie und den Home-button ersetzt und brauchte 1,5h dafür. Alles funktionierte.

Aber danach kam jedesmal nach circa 2 Minuten ein Reset und das iPhone bootete neu.

Das iPhone-Konfigurationsprogramm zeigte folgendes:

<Error>: CLTM: could not find Temperature property

<Error>: watchdog: did not receive thermal notification in time: 0x000003fe

In den Einstellungen, Allgemein, Info, Diagnose & Nutzung, Diagnose & Nutzungsdaten: CRC ERR!

Grund: Keine Kommunikation mit dem Temperatursensor im Akku. Dann WDT Reset.

Akku nochmals vorsichtig ausgebaut, die Buchse vom Mainboard hatte sich komplett gelöst!

Ich konnte die Buchse wieder anlöten, 4 Pins, aussen 2 für Spannung, innen die Daten.

Funktionierte nicht. Unter dem einen abgerissenen Datenpad ist ein 0,15mm Via, dass ich auch noch kontaktieren musste!

Jetzt kommt wieder z.B.: CLTM: stale battery temp: now = 1359865173, lastupdate = 271

Auch die Batterie selbst könnte defekt sein in einem solchen Fall.

Ich hoffe das hilft anderen :-) Gruss MartinW

MartinW, · Reply

WoW! Just finished replacing my iPhone 4 battery and I'm both relieved and impressed that it really was as simple as your site said it would be! There was a sketchy moment or two with the antennae piece but it all went pretty smoothly! This sure beats paying someone an outrageous fee to change the battery when it's easy to DIY!!! Thanks ifixit!

okhoosier, · Reply

From the tools list it seems as though the 00 driver is the one needed for the battery connector screw and the 000 is only needed if the external screws have been replaced. I ordered only the 00 driver which does not fit the battery connector at all. Luckily I had an eyeglass driver on hand that did the job. Which driver is required for which screws should be more clear.

mpeters04, · Reply

I did my battery today. It was easy. Battery was completely dead when I put it in, so I retried my old one to make sure I didn't mess up the install, then reinstalled the new one. After I plugged it in about 10 minutes, I finally got the charging indicator and 5 minutes after that, it turned on with the charger connected. My original battery was VERY glued in and took a bit of careful prying. It took about 4 hours to get to 100% charge. Very pleased with the outcome so far. I will update if I have any problems, but hopefully not!

superkep, · Reply

This is a great guide! The video and the step by step instructions makes this repair so easy.

kumosz, · Reply

This is a great guide! IMO the hardest part is getting the battery connector on the new battery in place. The plastic connecting the battery connector to the battery has to be very carefully folded and tucked between the battery and the pressure contact, all while keeping the pressure contact in the right place. (Use the old battery as a guide) Anyways, overall an awesome guide and very happy with the kit!

ericcox1, · Reply

First guide I have followed. Ten minutes, job done! Great job, many thanks

Rob Fogwill, · Reply

It would be helpful if the instructions/video addressed reassembly in more detail as the antenna connector doesn't just snap back into place and there are no photos showing how it fits. Other than that, the instructions are pretty simple.

clays4, · Reply

The new battery I received was dead and would not charge. I put my old one back in and all is well except for the old battery. Like a dumbass I ordered another one. I'll keep my fingers crossed.

ggoodlett, · Reply

i replaced the battery and now when i connect it to itunes, it says there is a problem and to contact apple for help. anyone know why this is?

69gunot, · Reply

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Ricardo Sinclair, · Reply

Thanks iFixit for the guide! It was a piece of cake to install the battery. I'm not sure why there so many comments about it being difficult. Thanks again!

Jacob Jordan, · Reply

Done :-)

The only tricky part was to put back the 2.5mm screw while aligning the battery connector and the pressure contact clip together with your finger!

huybui75, · Reply

The guide makes the process a piece of cake. The reassembly of the antenna connector should be shown in more detail. After closing the lid and pressing the top button, reboot started immediately and the SIM unlocking process went for a long (too long) time. I rebooted completely and everything came back to nominal.

jeagauthie, · Reply

Well, the process is not nearly as easy as the demo might suggest. Pay attention to the issues around proper screwdriver size as the screws are very easy to strip, especially the battery connection screw. Warming the glue behind the battery with a hairdryer really helped immensely as the battery was then easier to pry up and remove. Because of the short length of the battery connector screw, having a tweezer and magnifying glass helps. If your screwdriver is not not securely slotted into the head of the screw, make sure it is before you try to remove and re-install it. Unless you have patience and read the comments here carefully, your chances of experiencing a glitch are high.

Sarah, · Reply

Just completed. Mighty fiddly to work on. Only tricky part is re-positioning the battery connector so that all the items are flat and aligned for the screw to secure it. Used the plastic opener to help lift the battery out. You can hear the glue slowly giving up.

30 mins from start to finish. Now charging up. Thanks.

Alastair Dodwell, · Reply

I used your great kit, followed your helpful directions, and powered the phone back on while charging the new battery. The phone then indicated for about the first 20 minutes that it was "searching" for a cell signal even though it was able to use the cell network. (I made and received a call during this "searching" time.) It showed a strong wifi signal as usual; that also worked fine. This "searching" indicator problem just cleared up on its own. Once the indicator switched to show the usual 3G cell signal, the problem went away. Powered down and restarted, and after a couple seconds it showed the usual 3G cell signal. Now all seems well. Thanks much!

johngoldsborough, · Reply

Caution: New phones may contain T1 screw heads instead of Phillips.

ajg35, · Reply

any news on those screwdrivers? where can we buy them?


using something like the 18-compartment tray will GREATLY help with this one; there are over a dozen groups of parts. For re-assembly having a digital calipers to measure the 2.4 vs the 2.6mm screws also helps greatly.

awr, · Reply

My method for hardware management during delicate phone surgery is to take and print out on 8.5"x11' paper, one or more pictures of the open phone in various stages of disassembly, and then tape the screws to the appropriate spots on the pictures. Also write numbers on the pictures next the screws to indicate the order in which you removed them.


I did a successful surgery on my iPhone, be warned this is not for the faint of heart!

I've done iPod screen replacements, battery replacements, this is by far much more difficult and intricate.

Great write up! Thanks a million.

Jaysen Strange, · Reply

Couldn't even get both screws out of the bottom of the case. One was easy and other refuses to budge. Screws so small I can't see if it is turning or screw driver is properly seated. Sad I too have done screen replacements on other phones. Don't know any secrets to get the screw out

ckracht, · Reply

I also have a problem with seeing what is happening with some of those tiny little screws and parts. For other projects that I do, I use an Opti-Visor. It slips over your head and provides 10x magnification. ( You can find them on Amazon).

Yeah, it adds cost to the project and you would have to wait for delivery, but it sure makes a world of difference in seeing what you are working with / on.


On an early iPhone 4 I found that the #000 Phillips bit included in the 54 Bit Driver Kit didn't actually fit the screws. However the JIS #000 also in the kit did fit quite well. This is due to the JIS bits "thinner" design to prevent camming out of the slot. Otherwise everything went well. Looking forward to replacing the battery in my other phone that has the pentalobe screws. Glad I got the 54 Bit kit!

etler, · Reply

Use a vacuum duster and a sharp tool to pry out the dust, this can increase the volume insanely!

Dpairs, · Reply

At the very last second before insertion, the second new screw for the bottom popped out of my pliers! I dont' want to use the old ones, but I don't want to leave it with one screw. Can I get a replacement screw?

Otherwise it went together fine, and I figured out for myselkf that the contact needs to be bent,,,

loujudson, · Reply

What does the park that is gold and next to the 4.8mm screw for the antenna? Looks like I am missing that part and almost positive that is why I can't pick up or connect to any wifi signals. I have the screw and the antenna from another phone that is working and tried it on the broken phone and still doesn't work. Only thing different is that gold metal piece to the left of that 4.8 mm screw. Can I buy that part? how do I attach it?

Jay Pennington, · Reply

not able to unscrew

Naved Zaidi, · Reply

using suction cup with too much force breaks rear panel

lily einstein, · Reply

Remove the single 2.5 mm Phillips screw securing the battery connector to the logic board- for me this Phillips screw won't budge from its place have tried all the phillips combinations 000, 00, 0, 1 and the straight /slotted 1.5 mm but nothing. can some help me please purchased a replacement battery for my iPhone 4 but not able to do it just because of this screw.

Naved Zaidi, · Reply

I was going through the take apart and after reassembly, it seems to just sit there an power cycle. It's as though the battery is no longer working. Any thoughts as to what I may have done wrong?

Social Apples, · Reply

Use #000 fine screw driver!!!

bfbogaert, · Reply

Use an #000 fine screw driver to remove two screws from iPhone 4s!

bfbogaert, · Reply

There is a metal bracket that secures the connector, that will be removed before the conector is unfasten

poseido, · Reply

When I used a plastic opening tool to gently disconnect the battery connector from its socket, I accidently remove the socket too.. Now what? :( ......

odisseas, · Reply

Stuck on step 4 can't unscrew the battery screw. stopped trying as all i seem to be doing is damaging the screw any tips as to how to approach this?

Tazziii, · Reply

my phone doesnt have a screw that connects the battery to the logic bored...is that a problem?

sadie, · Reply

I didn't need to remove the battery !! why would you take the battery away, the motor can be removed easily with the battery in place, and the whole process would take less than 2 minutes if you exclude the battery steps

Mohammed Fahmy, · Reply

I have trouble with the screw: I bought my used and now opened it for the first time. The screw is totally messed up, I can't unscrew it because the screwdriver doesn't fit in the screw/doesn't unscrew it. What can I do?

dfrisch86, · Reply

Installed new battery without a problem. Now it does not hold a charge for more than 4 hours. Phone works fine but what did I do wrong?

Mary OBrien, · Reply

There is a small black L-shaped bracket of some sort that tits between the battery connector and the motherboard socket, with a loop on one corner that sits betwen the riserand the battery connector. Remove this now, and do not forget to re install it on assembly.

stevesontheroad, · Reply

When reattaching this bracket make sure your Battery ribbon is already tucked underneath the battery with only the minimum clearance required. Then make sure the brackets overhang is over the battery ribbon. Dont try to slide it under the Ribbon.

crimney, · Reply

In Step 5 be EXTRA careful with the battery connector as the socket can come off extremely easy. This can mess up the replacement a little bit and cost you extra. Otherwise, this guide is excellent.

Good luck, fixers!

I fix(ed) it!

mateuszkus, · Reply

Just be careful when removing the battery with the plastic pull tab. On some units, they use so much glue that it's virtually impossible to take the battery.

In such an instance, you could use the iPod opening tool to assist (just be careful where you stick it!)

klubn, · Reply

use the iPod opening tool to pry gently under the battery from the outer edge of the phone and work towards the plastic tab. the tab is not actually attached to the battery itself, but a plastic sheet between the battery and inner frame. the adhesive on the battery tends to be under the edge of the battery nearest the center of the phone.

David Iwanicki, · Reply

Understand that the plastic pull tab is part of the phone. It sits under the battery like a tray and is not connected to the battery so it needs to stay in tact.

mattcfi, · Reply

once the iphone restarted, the battery was at 30%.

baldus, · Reply

This i think is the most diffucult part.

Because they use so much glue on it. I have to did this with so much force.

Glad that i didn't kill the circuit board when i took this out.

Shoung0690, · Reply

My battery was so firmly glued in, it took a long time to slowly pry it loose. Patience is the key to this process. I could see easily damaging the circuit board by using too much force. The plastic tab did not help at all.

The ribbon cable attaching the new battery to the battery connector clip is longer than the original. I clicked the clip into the socket first and then was very careful to fold the excess while putting the battery back in so the ribbon cable didn't kink. One kink in this could sever the battery leads.

drathbun, · Reply

My ribbon cable was also longer than the original. How did you get it to not kink while placing the batter back into the phone? That seems to be my only hang up at the moment


Piece of cake! The hardest part was being sure the outer pentalobe screws were actually turning and I wasn't stripping them. Battery was glued firmly in, so I loosened it from the outside instead of using the plastic pull-tab. I pre-bent the battery connector neck before putting it back in and had no problems with it fitting in. Getting the battery connector aligned with the antenna piece underneath was a bit fiddly. Got the case back on, put in the new screws, and powered the phone on without problem. Had 40% charge, all seems well. Yippee!

chezbuttons, · Reply

Do NOT use a spudger or similar type of prising tool to try lift up the battery. Instead, just warm up the whole area with a hot air gun or hair drier to soften the glue.

The reason why I say don't use an implement to try lift the battery is because far too many times I've seen punctured & bent batteries come in to this workshop that have to be thrown out for safety reasons. It only takes a grain of sand, or a burr on the spudger and you're risking a potential cell rupture and potential fire.

Just use a bit of heat ( not a lot! ) to soften up the glue and it'll come away with the plastic pull tab.

Paul L Daniels, · Reply

These instructions don't mention putting the 2.5mm screw back in. I found this very challenging because it is so short, so very difficult to line it up to get it back in the hole, and very easy to drop it inside the phone. Take care.

robshopping, · Reply

Non problem with reassembly - just took patience - my is that the phone now does not want to charge the battery. It shows taht the battery is dead and charger needs to be connected but does not charge?

What have I not done coreectly - or at least what can I check to determine the problem?


Richard Bebee, · Reply

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