"When I got my iPhone 15 Pro Max in September 2023, I decided that I'd do everything I could to make the battery last. Well, an accident destroyed that handset, so I restarted the experiment in March 2024. Also: The best power banks you can buy in 2025 I wanted to see just how much lifespan I could get out of the battery."
"In my experience, no topic generates more articles, blog posts, and YouTube videos than how to get the best possible battery life from your iPhone, both daily runtime and overall lifespan. It's also the topic on which I get the most questions and comments. People have been obsessed with their iPhone's battery life since day one, and the more metrics and tweaks Apple adds to iOS to delve into what the battery is doing, the worse it has become."
An iPhone 15 Pro Max showed poor battery performance after 18 months despite following Apple's preservation advice. The handset was replaced after an accident, and the battery-preservation experiment was restarted months later. A charge limit of 80% was used to maximize battery lifespan while acknowledging a one-fifth reduction in usable capacity. Apple notes that 15 models can retain 80% capacity after 1,000 complete cycles under ideal conditions. Battery life behavior attracts extensive online attention and many user tweaks. The tradeoff between daily runtime capacity and long-term lifespan remains a personal choice, and charging strategy may change with a new iPhone 17 Pro Max.
Read at ZDNET
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