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Three Years of 80% Charge Limits on iPhone: The Results

Since 2023, Apple's newer iPhones have had an 80 percent charge limit for those who want to extend battery lifespan. Charging to 80 percent instead of 100 percent is supposed to put less stress on the battery, improving longevity.


For the last three years, I've used that setting on my iPhone. I started with the iPhone 15 Pro Max, then did the iPhone 16 Pro Max, and most recently, the iPhone 17 Pro Max.

After 12 months at an 80 percent maximum charge, my iPhone 17 Pro Max is at 97 percent maximum capacity with a cycle count of 277.


Last year, my iPhone 16 Pro Max was at 94 percent capacity after 12 months, and in 2024, my iPhone 15 Pro Max was also at 94 percent capacity.

During the year I tested the ‌iPhone 16‌ Pro Max, I tried not to let the battery dip below 20 percent. This year, I did the same thing, but I also tried to do more charging over USB-C than Qi2 or MagSafe. I'm not sure if that helped, but 97 percent capacity is the best result I've had yet with the charge limit turned on.

I don't know how my battery result compares to others, but if you've kept yours at 100 percent, you can compare your capacity to mine to see if there's any real difference.

Apple transitioned to aluminum and added vapor chamber cooling with the ‌iPhone 17‌ Pro Max, and I did think my iPhone spent less time uncomfortably warm than the ‌iPhone 16‌ Pro Max. It may be that the vapor chamber cooling made the biggest difference and limiting wireless charging didn't matter.

I don't use the iPhone 15 Pro Max or the ‌iPhone 16‌ Pro Max as my main iPhones anymore, but I do use them daily as test devices. They still have the 80 percent limit turned on, so I can share some longer-term battery results.

• iPhone 15 Pro Max (36 months) - 88%, 369 cycles


• ‌iPhone 16‌ Pro Max (24 months) - 93%, 343 cycles


• ‌iPhone 17‌ Pro Max (12 months) - 97%, 277 cycles

Last year, my ‌iPhone 16‌ Pro Max hit 299 cycles by September 24. This year, I'm only at 277 cycles. It's nearly two weeks later than I usually report results too, so the larger battery meant less charging.

The ‌iPhone 17‌ Pro Max has a bigger battery and faster charging than the ‌iPhone 16‌ Pro Max, so an 80 percent charge limit wasn't as difficult to live with as it was in the past. I rarely ran out of battery, though I did still bring a battery pack with me most places. My favorite battery packs right now are the ones with built-in USB-C cables, especially those that can attach to my iPhone magnetically but charge it over USB-C. It's faster charging that's still convenient. I also continue to be a fan of the super-slim battery packs that add little bulk and weight to an iPhone.

For the iPhone 15 Pro Max and ‌iPhone 16‌ Pro Max, I didn't think sacrificing a fifth of my battery was worth the capacity I ended up with, and that's still mostly the case. I'm guessing my 97 percent capacity isn't too far off from the battery health readings on iPhones that didn't have the charge limit turned on.

As for older devices, my two-year-old ‌iPhone 16‌ Pro Max only lost 1 percent capacity from 2025 to 2026, and my iPhone 15 Pro Max didn't lose any capacity at all during the year. Both phones had fewer battery cycles (44 and 17, respectively), but they're holding capacity even after sitting dead for short periods of time throughout the year.

The most hands-off way to manage battery health is to use Optimized Battery Charging, since it minimizes time spent at 100 percent battery while still charging to full. Setting an 80 percent limit and then turning it off on days you need 100 percent is also a good compromise that could save you battery capacity over time. Apple has 90 and 95 percent options too, which might be a better choice.

My iPhone 18 Pro Max is already set to 80 percent, so I'll check in again in September 2027. I'm going to stick with USB-C charging when I can, and I'm curious how the even bigger battery will affect longevity and what the 80 percent limit is like day to day.

What's your iPhone battery capacity and cycle count? Share it in the comments below and weigh in on whether you think battery charge limits are worthwhile.
This article, "Three Years of 80% Charge Limits on iPhone: The Results" first appeared on MacRumors.com

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Adobe Photoshop 25.5 - Professional image editor.

You can download Adobe Photoshop as a part of Creative Cloud for only $54.99/month

Adobe Photoshop is a recognized classic of photo-enhancing software. It offers a broad spectrum of tools that can turn your inspiration into incredible images, photos, composites, 3D artwork, paintings, and graphics on any device.

Photoshop has become the choice of thousands of creative professionals around the world. First introduced in 1988, it still is the world's leading image-editing software.

Intuitive and clean user interface

Although Photoshop for Mac is the most comprehensive graphics and image-editing software available in the market today, it has a very intuitive and easy-to-navigate interface.

With recently improved usability, this photo-editor has become even more enjoyable to use. The interface loads as soon as you decide to use Photoshop.

A user-friendly interface updates you about new features, suggests learning content, and allows you to quickly access recent files. You can easily pick up where you left or create a new project, access cloud and desktop pictures, and open an existing document.

Convenient content-aware fill workspace

Adobe has recently announced the launch of its new Content-Aware Fill workspace. It allows you to remove objects or distracting elements from your images easier than ever before.

This new option offers an interactive editing experience. Now, you can take full Control over which "good" parts of the picture to use to replace the undesired areas. It allows resizing the initial selection, rotating, scaling, and mirroring content.

Enjoy a range of new tools

The latest version of the software provides a new Frame Tool that allows you to enjoy much simpler masking. Now, you can place shapes and text into placeholder frames and fill them with pictures. To create elliptical or rectangular forms, you only need to select the Frame Tool and press "K."

There is also a new default feature of multiple undo. If you want to view an object before changes are applied, just click Control + Z (for Windows OS) and Command + Z (for macOS). Don't worry about losing any project changes in Adobe Photoshop on your MacBook Air or MacBook Pro. With a new auto-commit feature, they are saved automatically.

What's new in Photoshop

Version 21.2:

• In the latest version, you can make accurate selections of people with one click.
• Now, Adobe Photoshop can find and add all available fonts to your libraries automatically when you open a project.
• In updated Photoshop, Adobe Camera Raw workspace provides all your tools right where you need them so that you can work on your project more efficiently.
• You can experience higher accuracy with the enhanced Match Font feature that allows vertical text, provides multiple-line detection and offers even more typefaces.
• Now, you can change the orientation and add a rotation to any pattern in Pattern Overlays and Pattern Fill layers much more easily than before.

• Create and save your presets for future use or import and export to share inspiration.
• You can now adjust text alignment, spacing (leading and kerning), and font style (bolding, italicizing, underlining) directly from the Contextual Task Bar.

• 8 GB RAM (16 GB recommended)
• 4 GB of available hard-disk space for installation; additional free space required during installation (cannot install on a volume that uses a case-sensitive file system or on removable flash storage devices)
• Internet connection

Download Now]]>