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Battery draining and restarting

i am using iPhone 6s the problem is that almost 3 months ago my battery starting draining quickly and latter it start dropping 1% a minute plus also restarting on its own though my my battery health id still 100% i have done every thing that i could and lastly i have also restored my cell on factory reset but no use…i dont know is it the battery issue or U2 IC problem pls share your expert thought.

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Several things can cause Battery Drain issues. You will need to isolate some variables in order to get a better understanding of what is wrong. The problem could be a bad replacement battery, excessive current draw from one of the modular components (camera, button, screen) or it could be a problem on the logic board itself.

Here are some things to try:

It could be a bad replacement battery; there are lots of cheap batteries on the market.

  • Try replacing with a known-good battery or order a good one from here.

You could have excessive current draw from one of the modular components; for example, the backlight, a camera or a sensor. You may notice a hot spot on the phone or screen.

  • Fully charge the battery first.
  • Disconnect the battery and then disconnect one modular component at a time to see if you can determine which part is bad. I would start with the front camera flex, then the rear camera, then home button.

If that doesn’t make a difference, then you should try to disconnect the screen to see if it’s the screen or the logic board

  • Disconnect the battery, then disconnect the flexes for the screen assembly, buttons and cameras, leaving only the Lightning Dock connected to the logic board.
  • Go back after an hour or more and test the condition of the battery. You will need to download either coconutBattery (Mac) or 3uTools (Windows) to see the battery condition.
  • It could also be the Lightning port so you could try the same test as above but with the Lightning port disconnected once the battery is charged (connect it back to test the condition of the battery).

You may have a damaged logic board. This will require a micro-soldering repair and is not DIY. Drops, bends, water damage or using poor quality charging bricks and cables, can cause this.

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@hassanrana start with a new battery. If nothing else, it will give you a known-well starting point for any further trouble shooting. iPhone 6s 배터리 교체

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i have changed my battery and after replacement i used it like to 2 to 3 minutes and put it back in my pocket and when i reached home and took out it from the pocket it was off and despite of trying many times to turn it on it couldn't help me i even plugged it for charging and just apple logo appears and goes...don't know whats the problem now. U2 ic was OK and there is not short circuit the rep guy have checked it before battery replacement...

Pls help.

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