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User profile for user: BundyShappy
BundyShappy Author
User level: Level 1
10 points

CarPlay causes battery drain on all iPhones

I have never had battery problems with my iPhone until I purchased a new vehicle with CarPlay just over a week ago.

After pairing my phone with the car for CarPlay, I have had battery problems ever since and dead flat battery twice, by just leaving the phone off charge overnight!

I disabled Bluetooth and the problem went away, then I removed my vehicle from the CarPlay settings in my iPhone SE, enabling BlueTooth again and ensuring the phone was fully charged to 100%,

I checked the phone this morning and voila, battery level with Bluetooth on is 100% instead of 33% or less overnight!


I think that we can safely say that CarPlay does not time out when searching for the vehicle and is causing the battery problems!

This will answer the question for many people with battery problems that have CarPlay....


People can test this by simply charging your phone to 100%, turning off Bluetooth overnight and check the battery level in the morning.

Secondly, re-enable Bluetooth and remove your vehicle from the CarPlay settings in your phone.

Charge your phone to 100% and check your battery level again, in the morning.


At least people can manage this issue until Apple issues a fix by turning off Bluetooth at night or remove the vehicle from the CarPlay settings!

iPhone SE, iOS 11.4

Posted on Jun 8, 2018 3:53 PM

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User profile for user: kam236
kam236
User level: Level 1
14 points

Posted on Jun 19, 2018 1:53 PM

This exact same issue is happening to me. I thought maybe I had a defective battery since it was dying incredibly fast.


After seeing this post I turned off Bluetooth and I restricted Car Play. Viola! No more battery issues.

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User profile for user: BundyShappy
BundyShappy Author
User level: Level 1
10 points

Jun 19, 2018 2:14 PM in response to kam236

I also killed off the sync contacts in the Bluetooth settings for CarPlay then I also removed the vehicle totally from my bluetooth devices.

Night before last, 100% bedtime, morning 98% plus Bluetooth off.

Last night didnt need to charge the phone so left it at 93% with Bluetooth on, checked this morning after re-pairing the phone to car yesterday and enabling Bluetooth for hands free (but no CarPlay functions activated) and battery was 88%.

Looks like CarPlay functions, other than hands free, is the cause.


To my mind it is a combo of Carplay functions like, maps, sync contacts, car parking location etc that require both Bluetooth and Cellular that are causes of battery drain.

I have 2 wifi only iPads on 11.4 that have no issues at all.

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CarPlay causes battery drain on all iPhones

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