Battery health drastically degraded in 6 months to 95% on my iphone 14 pro max

After 6 months an average battery will be at 94%, so your iPhone is doing slightly better.

Batteries are consumables; they lose a little capacity every time they are discharged, then recharged. On average this works out to about a 1% loss for every 25 “full charge cycles”. As one example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use. For this example your battery capacity will lose about 1% per month. Of course, if the end-of-day level is higher than 20% the capacity loss will be a little less, and if it is lower than 20%, or you charge it during the day, the capacity loss will be higher.

Once the capacity drops below 80%, or if there is a message in Battery Health that the battery is not meeting peak performance expectations, it’s time to change the battery→iPhone Battery Replacement - Official Apple Support

The absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

That is NOT drastic. It's actually normal. A drop in Battery Health of 1% per month is considered normal. Every time you charge your iPhone, it's battery health will drop, little by little. It's what batteries do, ALL BATTERIES. If your battery health dips to 80% or less in the first 12 months of ownership, which is most unlikely for you, then Apple would replace the battery under warranty.

Do make sure:

1. You are plugging your phone in to charge when you go to bed and leave it plugged in to charge all night, every night, with Wifi on, so your phone backs up every night
2. You have turned on Optimized Battery Charging in Settings > Battery > Battery Health
3. You don't let the phone fully discharge or go below 20% as this can age the battery faster

It is normal for the Battery Health to decline an average of about 1% a month over longer time periods.

Apple is not going to bear any cost unless the Battery Health drops below 80% while he phone is covered by the AppleCare warranty.

Make an appointment at the Apple Store to confirm this if you wish.

Ash_handle wrote:

the most important point is ill explain you that i dont charge the phone more than 80% and never take my phone below 25% so there are less chances of degradation.. however the behaviour is rubbish. Once charged to 80 or 82% and rebooted immediately for a fresh start i get a battery % 85 or 86% automatically.. behaviour is weired…

That is part of your problem; you are falling for an internet myth that somehow never fully charging your phone is good for it. It isn’t, and it will cause your phone to degrade faster than if you charge it overnight, every night, with Optimized Charging enabled. As I explained in a previous post.

Believe it or not, just because you read something on the internet does not mean it’s true.

Yes, sometimes physics can be unsatisfactory. But regardless, your phone is completely normal and is performing slightly better than its design goal.

You are NOT suffering anything here. Batteries degrade. It's a fact of electronic life. Follow the suggestions I provided and accept that your battery health sill continue to decline. Or buy a phone which doesn't tell you the battery health. That way, you won't know what your battery health is. But even in phones like Samsung phone, the battery health is declining, because its what batteries do.

No one is laughing. We are telling you the facts of battery health. You came here hoping we'd be sympathetic to your unfortunately false perception that your phone is not behaving as designed. Your phone is performing as designed as ALL BATTERIES degrade and you CANNOT stop that.

Stop worrying about what you cannot change and just enjoy our phone.

Take care.

a real techy guy wont mind these things because its..... yeah normal.

Ash_handle wrote:

Really unsatisfactory answer..

Sorry if facts are unsatisfactory to you. No one can wave a magic wand to stop the chemical aging of batteries.

Maybe if you post on another support site, someone will give you the answers that you are looking for. Unfortunately though, your battery will not listen to them.