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Repair information and guides for the iPhone 6 that was released on September 19, 2014. Model Numbers: A1549, A1586, and A1589

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iPhone 6 battery drain

My 2 year old iPhone 6 (not 6S) loses 10% battery per hour regardless of use. Only way to stop it is to power it off. It use to only drop 3-4% overnight while I slept. Now it won't last overnight without at least 80-85% charge and I wake up with a near dead battery. I hate leaving my phone plugged into a charger so much. Can't be good for the battery's long-term life.

I've recently replaced the battery and restored to vanilla iOS 10 with only slight improvement.

The dramatic change happened several months ago after leaving my phone plugged into my wife's non-apple car charger for a two hour drive out of town. We later realized that this same charger was responsible for destroying her iPhone 6+ battery just a month before (her phone was still under warranty and apple replaced it). I figured replacing my battery would bring back the old usage capacity but it didn't.

I suspect some other component in the power system was damaged by the defective charger. Something between the dock connector and battery.

Looking for suggestions on other replacement parts to try.

Appreciate any help,

Nathan

Answer this question I have this problem too

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How goes it Nathan. So basically you're looking at one of two causes. Battery or tristar.

Did you replace it with a generic or "oem" battery found online such as Ebay, or a 100% guaranteed original Apple battery? Believe it or not it makes the difference. I always suggest try 2 new batteries just in case the replacement is faulty....happens all the time.

More likely, from your description on using the non Apple charger, is your tristar ic on the motherboard itself has been damaged. This is so very common when using aftermarket chargers with iPhones.

Your Tristar ic (integrated circuit) is basically a small microchip or bga on the motherboard that is in charge of charging the device. This chip also is interacts with the battery itself.

Many generic charging cables don't regulate voltage very well and can send a spike in voltage to the chip. If more voltage goes to the chip than its designed to take....poof goes the chip!

Signs of your Tristar ic being damaged is "fake charging", phone not charging, battery draining very quickly even after replacement, and sometimes even the device not powering on at all.

I would first rule out 1 more battery to just be sure. Then if you can find a local motherboard specialist have them test if the chip is good and if it needs replacing. I'll bet anything that's your problem!

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Hello-- thanks for this information. My cousin has an iPhone 6 and the battery life is fine (I had her check 'Battery health' under settings) but it exhibits the same weird behavior as described above: it says it's fully charged but then is almost immediately down to 10%; then when my cousin reboots the phone, the battery is back up to near 100% again. The guy at the genius bar said it's the 'battery sensor that's bad' and they quoted her $299 and 3 ridiculous weeks for repair. Is the battery sensor the same part as the Tristar ic that you mentioned above, and how much for a decent motherboard specialist to repair it, please? Thanks in advance for any and all suggestions/help!

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please who can help my battery drains fast and goes off and on by itself iphone6

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If the phone does not work left alone for 10 hours, there is something draining it. Start with turning off WiFi and use the mobile net and then reverse. Turn off the bright screen, and do not use it as mobile phone hotspot.

The phone is too new to need a replacement battery - it may be the mobile net that drain it.

Charge it full, and then play music as loud as it gets, vibrate, hotspot and 4G use it heavily to it goes black, and then charge it. Now you should charge it 5 seconds a time - but just interrupt the charging with use, but charge it to full. Sudden drain in this mode is “good”, small steps to it is completely full. Then drain it with no mercy, lights, bells and whistles on with shaking.

Just leave it beside your bed fully discharged the entire night. My guess it is sensors in the batteries that fail and you never reach the voltage limits. There is no chemistry in the new batteries, it is logic, and “application”, it is software. You “expand” the voltage range. When you drain, it is to tell the software that the sensors are wrong, there is still something. Inside the battery, the electrons will try to tug the slower moving electrons along and the batteries can exhaust all it energy just to get the slowest moving faster. That is when the battery is gone - it will still charge. But let it rest, discharge completely, and - the software does not get worn out.

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Nathan Jones will be eternally grateful.
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