iPhone 12 Pro Max — poor battery life

I bought that and is the same, I changed the 5G to LTE and the battery last a little bit more. Also, my phone don’t get too hot. But is really weird we have to make so many changes in order to save battery in a phone less than a month old 😣

You can't compare iPhones that way.

In particular, if you have 5G service, you will see higher battery usage.

Samsung actually explains this nicely:

You may notice that your phone's battery drains faster than usual while you are connected to a 5G network. This is a limitation of the current 5G networks, and will be improved as the networks expand.

At this time, the 5G networks are only used for data connections and are not yet capable of carrying phone calls and messages. Your phone will need to maintain a connection to the 3G or LTE network in addition to the 5G network so that phone calls, text messages, and data will be delivered consistently.

Because your phone is connected to multiple networks simultaneously, the battery will drain faster than one would typically expect, and the phone may get warmer than when solely on 3G or LTE. …

As the 5G networks grow in capacity and capability, they will be able to handle more of your phone's functions with less battery drain.

https://www.samsung.com/us/support/troubleshooting/TSG01201462/

That only tells you what the app percentage is of 100% used your battery. If you open safari for 85% of the time for 2 hours it will show 85%. This does not tell us what we need to know.

What we need to know is the rate an app uses the battery.

Not a percent of battery usage by app.

Does not matter if safari was used 100% of 100% and your phone ‘s battery was fully consumed in 5 hours. It does not answer what you seek. You want to know, is the rate at which any active or non-active app is consuming the battery.

Next step is someone above our pay-grade figures out how to lower that rate.

I also own an iPhone 12 Pro Max and the battery life sucks. It drains even in standby mode. I went to sleep at 10pm and left 40% battery life on my device, woke up at 7:30am to a dead phone. All my other Apple phones would display near the same percentage of charge left when I awoke the next morning. Geez I hate this.

Most people connect their phone to a charger overnight.

What did your Battery preference pane show used the power?

An easy way to duplicate this is to

leave a GPS app or anything else that continuously interrogates Location Services running.

If I have sufficient charge I won’t charge overnight. Also when I checked what used my battery life between the hours I was not active on my device I saw nothing. Point to note I saw Siri for a shot period between 12am and 1am. But nothing else.

It is hilarious to see some support answers where it says, Switch off this, disable that, reduce that, use this, charge slowly/fast/80% etc., this reminds me of the Windows PC era, in order to use this new iPhone makes me a nerd of some kind. Then they say AI is going to make your life great, wonder why AI cant just do all this advice and just "Manage my battery by knowing my usage"

I am so unhappy with my iPhone 12 max. I too have battery issues. I can have a full 100% battery and not use my phone. Within hours the battery is almost red. I don't even want this phone. I wish I could return it to Apple. This is the first time (I have all Apple products from iPad to laptop to watch) that I am really disappointed with my product. These phones aren't cheap as you know and Apple needs to make this right.

I agree, I charge overnight but phone battery discharges so quickly once charged, 50% gone in 3 hours with little use and no gaming, never had an iPhone with such poor battery life !

There is an existing thread about this issue here: https://discussions.apple.com/thread/251956914

iPhone Battery and Performance - Apple Support

Do what a billion other users do:

Charge the device while you sleep.

Not helpful, just snarky and rude.

My apple iphone 12 pro max battery last for 5hrs 30 min. is it expected? i was expecting at-least 10 hours