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Repair information, troubleshooting tips, and guides for the sixth iteration of Apple iPhone, announced on September 12, 2012. Model: A1428, A1429

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iPhone 5 battery replacment failed, due to U2 IC chip malfunction.

I have realized that when the Iphone 5's U2 IC chip is not working properly, once the battery is 100% dead it is toast. When replacing the battery with a new one the phone works fine, until it has completely drained again. If the phone is on it will charge just as long as it does not 100% deplete its battery life. My question is what happens to the battery that it can never work again? Can I recharge this 100% depleted battery another way, then reinstall as a new fix, instead og buying a new battery every time?

Answer this question I have this problem too

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Why not go somewhere that you can replace u2?

It's not much easier? :)

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Just for your knowledge ...

Component u2 that is not good cause high current consumption, overheating.

Difficult and uncomfortable to use the phone like that.

If you do not correct it, instead of buying batteries is better for you to buy an old Nokia phone, that will cost you as one battery for the iPhone 5, and Nokia do not have u2 and the battery will stay weeks LOL :)

send my the iphone i will send you 10 NEW Nokias!

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Do you know where I can replace the U2 IC for the iPhone 5 in Europe ?

If not, Do you have a step-by-step review to do this reparation ?

Thanks

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Hi, I can replace u2. That's what kind I usually do. Where about are you if I can help

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Can we replace the ic board in iphone 5s. The shopkeeper is fooling me from 2 months saying we are not getting the matching IC Board. Is it true apple has such unmatching ic board issue ?

Please help me with my question !!

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Although not recommended and as a last resort only, it's possible to charge the battery directly (after removing it from the iPhone) by carefully positioning the exposed black and red wires from a USB cable on the battery connector.

I've done this twice with the non-severed end of the USB cable connected to my laptop (only connect it to the laptop AFTER having placed the wires on the battery). This was quite fiddly to accomplish and I had to tape the wires to the tabletop for stability. I used this YouTube video to pinpoint where to place the wires:

https://youtu.be/msamRT284pY?t=17

I left it for about 15 minutes and after putting it back in the phone had a 10% charge. I was then able to plug my phone in and continue charging the normal way.

If you attempt this, be careful and know the strength of the power source you're going to plug it into. Also, don't leave it too long.

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You need change the usb ic (U2). It's happens mostly for people using fake usb cable for charging.

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What is a fake USB cable? Why other smartphone are able to charge with 'fake USB cable' without damage and during years? I think Apple use a cheap and fake charge IC...

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If you have already tested multiple batteries and received the same issue, then yes that can be the problem.

Apparently these guys are located in Europe and can replace this IC for you:

http://cepmobilservis.com

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I have the same issue. Here is my fix

Whenever the battery dies 100% I open it up and remove the battery (very easy to do with a $3 kit from eBay)

Fortunately my gf has the same phone so I open her's up, remove her battery then put mine in to charge. Once charged i put the original battery back in my phone and it works. I then put my gf's battery back in her phone. I can do it now in under 5 min.

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Yes, you can recharge the battery on another iPhone 5 then you can put it back into the iPhone that has the U2 ic broken and it will work fine as long as you keep the battery charged or you will have to charge it in another iPhone 5 just to get it running again. Hope this helps!.

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It is a business trick of Apple ( I think it is dishonesty) that Apple don't want it's users to use old mobiles for long time. That's why eventually they add some features in new updates which may cause one of old phones not work properly.

An other example is signal disappears on iPhones 4s, after updating to iOS 9

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well first off i would grab a multimeter and test if the battery still has a charge, if you read a voltage its not completely dead the iphone just refuses to charge it when its so low

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no matter what the battery should read a voltage unless it is a bad battery. even a battery even when read by the phone as dead will still have a voltage.

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Step by step would be irrelevant if you have no experience soldering, but the equipment will cost you more than a new phone ...

If you want to fix it you can send your iPhone to us and we will reapair it in our lab with this delivery should take about a week , talk to me by email if you are interested

Check my user profile right here for my address.

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Yohai, you were getting to close to SPAMing here.

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https://www.mendmyi.com/blog/2014/06/has...

i have come across this problem and thought it was water damage although the water markers tell a different story. I tested the battery in another phone and low and behold it charged. Once charged enough to power on i put it into the faulty phone and it continued to charge. there's a few options

1. don't ever let your phone completely drain of power (not easy)

2. get it fixed as per above link

3. buy a battery bank/charge case and again don't ever let your phone drain completely

4. take a chance with taking it back to apple for a replacement (not easy either)

Apparently fault is due to using non-apple chargers or car chargers which charge at different voltages that the iPhone isn't designed for which in turn damages the U2 ic chip.

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Thats not the fault per definition, the fault is, 1. water damage, 2 a hard drop causing IC to crack, 3 using cheap ass AC charger without over voltage/current protection. Different voltage dosnt matter as long as charger have the correct protection circuit, and it doesnt need to be apple but can be from other trusted brands as well.

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Your fault per definition sucks. I have never seen an u2 ic cracked due to hard fall or any like that. I have repaired tons of Apple phones. I didn't count fakes as branded 3rd party products. U2 ic gets fail people who uses fakes and copy unbranded cable. The original apple and branded usb cable is also having a protected circuit in it.

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This also happens on iPad Mini's for the same reason.

I had some success with a miniature "bypass board" using a tp4056, couple of discretes, thermistor and two SMD LED, that works.

Solder the pins to the +5V and Gnd on the dock and then put the completed tested microassembly somewhere where it can't short out (under the battery tape is a good place)

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Hi,

you can also add a micro USB charging module in parallel to your iPhone battery to charge the battery independently from your iPhone's main circuit board as described in:

http://www.minimill.at/en/iphone-5c-accu...

It's basically the same as manually removing your battery each time for charging at a LIPO charging module.

However this requires a lot of electronic skills and voids the warranty!

Hope it helps.

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Check this

https://ibb.co/mD9t8v

try to check the track at this tp fourth with a multimeter. This track is devoted to checking function usb ic function, in other words u2 in iphone 5. if among the four or all tp contains a small or large ground, means ic u2 short circuit or damaged and immediately replace it. if examined does not contain ground, instead of u2. the size of the short circuit must be true if damage to u2. if there is no short circuit on the fourth tp, please check the battery connector. usually at the time of replacement batteries for the revocation of the battery connector flex too hard and less conscientious, could make battery connector on the pcb become shaky, as a result the battery is not detected by the gas gauge and the circuit is directly protected by way of breaking the current to the battery lines. iphone will reboot loop. if this is the case, then immediately re-solder on swi bat and bat pin ntc. Safety plug the battery into the meeting, in order to avoid a gap between the spark plug.

I am happy to join here, to share knowledge and experience sharing.

you are all professional technicians?

solve problems and continue to learn ,,, good night ...

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If you can’t change the U2 chip, change the board that houses the chip..

This will solve the draining battery issues.

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