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Article Summaries:
- A ZDNET reader spent two years charging his iPhone exactly as Apple recommends to test battery longevity. After purchasing an iPhone 15 Pro Max in September 2023, he followed Apple’s guidelines-including setting the charge limit to 80%-to preserve the battery. The device’s battery performance deteriorated sharply after 18 months, prompting him to replace it with an iPhone 17 Pro Max in March 2024 and restart the experiment. He aims to see whether the newer model’s battery can retain 80 % of its original capacity after 1,000 charge cycles under ideal conditions, a claim Apple has made for the 15‑series and later models.
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