iPhone 17 battery drains heavily when idle

Sika_41 wrote:

why does my brand new iphone 17 drains heavily even when sittling idle. It’s just a month old bought brand new in box not secondhand or refurbished device

First of all, iPhones are small computers, you can hold in your hand, which also takes photos and makes and receives phone calls. They are never really idle, even when not being used. Background activities, such as fetching email, app refresh, indexing data, remaining connected to either a cellular network or Wifi are going to drain any phone's battery.

But to really see what is using the most power, open Settings > Battery and you'll see a list of everything which has consumed power. You may see apps like Facebook, Instagram, WhatsApp, which are all Meta apps, which are notorious for draining a battery. I find those apps should be force closed when not being actively used.

Are you plugging your phone in to charge when you go to bed at night with Optimized Battery Charging turned on and leaving it on charge ALL night, EVERY night? If no, you should be doing this to ensure the health of your battery and to start the day with a full days charge.

There are alway background processes working in your phone, even at "idle." Some check for new incoming messages, others for updates or document changes, and others maintain on-standby conditions for your cellular service so you don't miss calls.

Web pages left update constantly. Leaving a browser window open that you don't need to access in the next few minutes will increase rate of drain.

Most processes only stop when you turn OFF the phone. Even then, a small amount of battery power is needed to maintain your user settings. Otherwise, you would have to reenter all your personal settings every time you started the phone.

If you have ill-advisedly installed aftermarket "security" or "cleaning" apps, check your feet for self-inflicted wounds. The new mayhem-makers for all Apple device are "client-side†" VPNs. They can cause serious battery drain while doing nothing to make your phone safer.

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† — "client-side" VPNs are those NOT issued to you by an employer to allow remote access to company servers. They are instead the ones over-hyped in adverts using fear marketing. Don't reward fear marketing.

The measure of battery health deterioration/drainage is subjective and can vary depending on individual usage patterns. There is no universal standard to determine whether the battery health deterioration/drainage is normal or abnormal because it heavily relies on how the battery is used and maintained.

Protect & Prolong the Life of your iPhone's Battery:

1. About the battery usage on your iPhone, iPad, and iPod touch ...
2. Batteries - Maximising Performance - Apple (IN)
3. iPhone Battery and Performance
4. About Charge Limit and Optimised Battery Charging on iPhone - Apple Support (IN)

• Find out what to do if Optimised Battery Charging doesn’t activate.
• Find out what to do if your device stops charging unexpectedly.
• Find out what to do if you think your battery is draining too quickly.
• Find out how to charge and maintain your iPhone battery.

Try to monitor Battery usage by iPhone Activity as shown below

What is shown under battery usage? Checking that would give you an indication of the usage behavior.

1. Background Activity
2. Notifications
3. Connected to Charger
4. Or any Other

Try some of these options too.

To prolong the life of your iPhone battery, you can follow these tips and best practices:

To prolong the life of your iPhone battery, you can follow these tips and best practices:

1. Optimize Battery Charging: Enable the "Optimized Battery Charging" feature on your iPhone. It helps reduce the wear on the battery by slowing down the battery aging process. You can find this option in Settings > Battery > Battery Health. About Optimized Battery Charging on your iPhone - Apple Support (IN)
2. Avoid Extreme Temperatures: Extreme temperatures, both hot and cold, can negatively impact your battery life. Avoid exposing your iPhone to excessive heat or cold, such as leaving it in direct sunlight or in a freezing car.If your iPhone or iPad gets too hot or too cold – Apple Support (UK)
3. Use Original Chargers and Cables: Always use Apple's original chargers and cables or certified third-party accessories. Low-quality chargers or cables can damage the battery and reduce its lifespan. Identify counterfeit or uncertified Lightning connector accessories - Apple Support (IN)
4. Avoid Draining the Battery to Zero: Charge it whenever the charge becomes lower than 20%. The rest is up to you when to charge. how long to charge, how often to charge, which adapter to use starting from 5W to 140W USB-C Power Adapter etc.
5. Optimize Display Settings: Adjust your display settings to optimize battery life. Lower the screen brightness, enable auto-brightness, and use shorter screen timeout durations. Adjust the display and text size on iPhone - Apple Support (IN)
6. Minimize Background App Refresh: Limit the number of apps allowed to refresh in the background. Go to Settings > General > Background App Refresh and disable it for apps that don't require real-time updates. Switch apps on your iPhone, iPad, or iPod touch - Apple Support (IN)

Sika_41 wrote: "...bought brand new in box not secondhand or refurbished device"

Sika ~ Does the device itself confirm that it's entirely new?...

Go to:

Settings > General > About

...Do you see a 'Parts & Service' section there?

If so, tap it and in the resulting pane, does it say anything about any parts being 'Unknown'?

iPhone parts and service history - Apple Support

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