I thought it might be a good idea to post a battery life thread.

The idea is people post just before they put the phone on charge for the night. This will help track battery usage over time.

Please follow the following format

• iOS version
• Battery percentage remaining
• iPhone 13 mini / iPhone 13 / iPhone 13 Pro
• Screenshot of your daily use

iOS 15
iPhone 13
47% remaining

I think I am seeing a bug in the reported battery life. My screen time seems to be going down and then going back up again. At one point it went up to over 6 hrs on-screen time and then it started dropping again and going back up again. Bizarre behavior. Anyone else seeing this? Am I misunderstanding how this all works.

It went from this: To this:

After chatting with Apple they suggested that the phone is in a settling period with battery optimization going on. I will keep an eye on this and see if it settles out after maybe a few days, being a new device and all. So far the 13 Pro Max has exceeded by expectations.

Yeah, the Pro Max seems to have stellar battery life! I will post my day two results for my iPhone 13 in a few hours but so far I am very impressed!

Taz Mangus said:

I think I am seeing a bug in the reported battery life. My screen time seems to be going down and then going back up again. At one point it went up to over 6 hrs on-screen time and then it started dropping again and going back up again. Bizarre behavior. Anyone else seeing this? Am I misunderstanding how this all works.

It went from this:

View attachment 1850006

To this:

View attachment 1850008

Click to expand...

Your SOT looks accurate - the charts are a rolling 24hrs that shift by 3hr increments. Difference between the two photos is first 3hrs rolling off (~1:15 SOT came off) on the left and latest 3hrs rolling on (~1:14 SOT added) on the right.

That said, your Screen-Off Time is messed up/has a bug…. Some rolled off the left, nothing was added on the right, and still reporting similar (and incorrect) screen-off time.

FWIW, I’ve notice a reasonable amount of mis-reporting of Screen-off Time (not a 13).

reppans said:

Your SOT looks accurate - the charts are a rolling 24hrs that shift by 3hr increments. Difference between the two photos is first 3hrs rolling off (~1:15 SOT came off) on the left and latest 3hrs rolling on (~1:14 SOT added) on the right.

That said, your Screen-Off Time is messed up/has a bug…. Some rolled off the left, nothing was added on the right, and still reporting similar screen-off time.

FWIW, I’ve notice a reasonable amount of mis-reporting of Screen-off Time (not a 13).

Click to expand...

The issue is about the on-screen decreasing when it should increase.

Taz Mangus said:

The issue is about the on-screen decreasing when it should increase.

And that’s what I try to explain.

Between your two pictures, you added ~1hour ~10-11am, which would show >6hrs SOT if you checked the graph before noon on 9/27. Then after 12:00 noon, you screen-grab the graph which ADDS 9/27 12-3pm (almost nil SOT) and SUBTRACTS 9/26 12-3pm bars from the first pix (> 1hr SOT). So on 9/27 at:

10:30am it will display 5:24 SOT
11:59am it will display ~6.24 SOT
12:01pm it will display 5:23 SOT

A 3hr window rolls on and off at noon.

Battery life is getting better each day!

iOS 15
iPhone 13
50% remaining

I haven't plugged in my 13 all day and I have 75% left now. I'm not a "power user" but I've been downloading and listening to podcasts, making calls, texting, checking emails, and using apps throughout the day. I didn't leave home fully charged either. I think I last plugged my phone in yesterday early afternoon.

I came from the SE 2020 and I had to plug that in very frequently the past 6 months. I could use up 50% of the charge on my SE by 9 am.

It's great not having to worry about battery life anymore for now. This is the most expensive out of pocket phone purchase I've ever made, but I'm very satisfied.

This is freaking INSANE.

iOS 15
13 Pro Max
65% remaining.

I took this off the charger at 7:07am. It is now 10:05pm. 65% battery left. I am certain that I could leave this overnight and get through tomorrow on the same battery. In fact, I am going to try it.

reppans said:

And that’s what I try to explain.

Between your two pictures, you added ~1hour ~10-11am, which would show >6hrs SOT if you checked the graph before noon on 9/27. Then after 12:00 noon, you screen-grab the graph which ADDS 9/27 12-3pm (almost nil SOT) and SUBTRACTS 9/26 12-3pm bars from the first pix (> 1hr SOT). So on 9/27 at:

10:30am it will display 5:24 SOT
11:59am it will display ~6.24 SOT
12:01pm it will display 5:23 SOT

A 3hr window rolls on and off at noon.

Click to expand...

If the SOT is a rolling 3 hour period, how do I calculate how much total SOT I have used?

I charged my 13 Pro Max Sunday at 10:30pm. It is now Monday 11:00pm and I have 56% battery left. So far I am able to go a good 2 days before I need to charge the phone, usually when it hits 20%. Unbelievable.

Any updates on 13 Pro (not Max) battery life? I’m curious about real life comps to 12PM.

iOS 15
13 Pro Max
10% remaining

I think this might be going back to Apple for a replacement unfortunately…

PBz said:

Any updates on 13 Pro (not Max) battery life? I’m curious about real life comps to 12PM.

i will give you an answer in a few days. Switched yesterday evening from 12 PM to 13 Pro. Reason was longer battery and smaller display. Have been using the Plus size since 6S Plus because of battery and this is the first time the normal size iphone has a better battery than last years max.

robinium said:

iOS 15
13 Pro Max
10% remaining

I think this might be going back to Apple for a replacement unfortunately…

Ok, it gets weirder… now my battery page is showing that reminders has 54% of battery usage today, with 1 minute of screen on time and no screen off time?! Plus you can see over 20% usage today for that small time… there must be something up with my
13PM


EDIT: I just attached my MagSafe charger at 5%. Over the following 30 seconds, the battery drop to 4%, then 3%, while the MagSafe was connected. It is now going back up after 4 minutes, showing 4%.

iPhone 13 Pro Max

21% left.
36 hours since 100% charge
Around 15hrs SOT with default settings

check this post for details:

13 Pro. Mine's not been great yet. Got it on launch day, so I would have thought the indexing would have sorted itself out.

iOS 15
51% remaining
13 Pro Max

Is this reasonable?

Boardiesboi said:

iOS 15
51% remaining
13 Pro Max

Is this reasonable?

I would say based on other Pro Max results that is a little below par. Have you clean installed?

iPhone 13 Pro
iOS 15
52% Remaining

Im one of them nerds who follows 80% - 30% battery charging pattern. For that very reason my year old 12 Pro Max was still at 100% Battery Health when I sold it.

Risco said:

I would say based on other Pro Max results that is a little below par. Have you clean installed?

Nah did a restore from iCloud from my 12 PM. Then did another restore from Mac to fix the unlock with Apple Watch bug.

Will monitor the next few days and see if it improves.

Boardiesboi said:

Nah did a restore from iCloud from my 12 PM. Then did another restore from Mac to fix the unlock with Apple Watch bug.

Will monitor the next few days and see if it improves.

I’m getting over 7 hours at the 50% mark, close to 8 hours, could be the way you use the phone, also cellular data drains battery quicker than WiFi.

Brightness levels?

Are you guys charging to 100%? I’m not going over 80%.

Ent said:

Are you guys charging to 100%? I’m not going over 80%.

100% every day 365 days a year, my 12 pro max had 99% battery health when I sold it.