Battery Drain Issue on iOS 18.1 (iPhone 16 pro)

Are updating the iOS multiple necessary functions will take place. This includes syncing and indexing photos, music, videos, third apps and much more.

Generally this activity is done at night during normal downtime for the iPhone. If you updated to iOS 18.1, 18.1.1 or one of the betas, Apple Intelligence needs to complete updating and then AI needs to start learning your new apps, etc. This process typically takes 3 to 5 days depending on multiple factors. It can certainly be less.

Pustiu314p wrote:

Same problem here and I start to regret that I bought the 16 pro. It holds even less than an 15 pro…. So disappointing but a good lesson to remember to look at other brands next time.

Sure, look at other brands, because if you do, you'll see on their respective forums, just as many people having battery drain issues. There is no magic bullet for this. What you need to determine is what is causing your battery drain. We have two iPhone 16s (a Pro and a Pro Max). Battery life on both is nothing short of amazing.

At a minimum, when was the last time you performed a Forced Restart on your iPhone? --> Force restart iPhone - Apple Support

Next, what do you have your phone set on for Cellular? Trying to stay connected to a network is a HUGE user of your battery. Open Settings > Cellular > Cellular Data and either change it to 5G Auto or if you are in an area where 5G service is spotty at best, set it to LTE, which may use less power.

Another user of power is Background App Refresh. There are only a few apps I want to constantly be refreshing in the background and you have full control over that in Settings > General > Background App Refresh.

Finally, go through this link for other suggestions --> If the battery in your iPhone drains too quickly - Apple Support

If the end you choose another brand, that's fine. You should buy what you think best your needs and it really doesn't matter to anyone here what you spend your money on. This is after all, a user to user only forum.

No two iPhones are alike in their batteries and what works for one may not work for another. If it fixed his device, it worked for him.

Are updating the iOS multiple necessary functions will take place. This includes syncing and indexing photos, music, videos, third party apps and much more.

Generally this activity is done at night during normal downtime for the iPhone. If you updated to iOS 18.1, 18.1.1 or one of the betas, Apple Intelligence needs to complete updating and then AI needs to start learning your apps, etc. This process typically takes 3 to 5 days depending on multiple factors. It can certainly be less.

The average user (if there is such a thing) loses about 1% battery health per month. Your battery health being at 81% seems consistent with losing 1%. The graphs are consistent with a recently updated device. You may want to do a forced restart in case an app is stuck in a loop.

Force restart iPhone

1. Press and quickly release the volume up button.
2. Press and quickly release the volume down button.
3. Press and hold the side button.
4. When the Apple logo appears, release the side button.

If iPhone doesn’t restart after you try these steps, see the Apple Support article If your iPhone won’t turn on or is frozen. Or if your iPhone isn’t working as expected after you restart it, see the iPhone Support website.

Notifications from Gmail was killing my iPhone, so turned it off.

Battery charging could not keep up with all of the notifications I get from Gmail.

Battery drain is normally higher for the first 3 to 5 days and maybe a little longer if you enabled Apple Intelligence.

A new iPhone battery hasn’t learn its peak capacity yet either. It usually takes several charging cycles to reach peak capacity and performance. Post a list of what battery percentage your apps are using in last 24 hours and 10 days .

Have you done a forced restart of your iPhone?

WhatsApp has a huge issue. There are multiple posts here and other social media platforms reporting this. An easy test is not using WhatsApp for several days. I understand it’s not always possible. But a lot of evidence points to it.

Force restart iPhone - Apple Support

18.1.1 resolved my issues. Thanks.

See if this helps --> If the battery in your iPhone drains too quickly - Apple Support

Can you show a screenshot of your battery usage for last 24 hours and last 10 days? That’ll indicate what apps are using up your battery capacity.

Looks like this.

Well plus running it in low power mode.

Give your iPhone a day or talk settle down. You and I cross posted and we didn’t see each other’s post.

I had the same problem. I thought the update to 18.1.1 fixed it, but the rapid draining has resumed. I’m dealing with it by keeping the phone in low power mode.

Post the list of apps and battery consumption please. Here’s mine,

Show a screenshot of last 24 hours and 10 days of battery usage by app please. Here’s mine.

I bought the iPhone 16 Pro 4 days ago and the battery lasts the same as my iPhone 11, which I've had for 3 years. I was reading that it's because of the iOS 18.1.1 update that the battery drains very quickly. From what I've seen, the battery lasts more than 18 hours, but this one only lasts 6 or 7 hours.