ZDNET's 2-year iPhone battery test shows Apple's charging advice works
After 24 months of following Apple's 80% charging limit, the battery health remained impressively high.
Deep Dive
ZDNET's Adrian Kingsley-Hughes tested Apple's battery optimization guidelines on an iPhone 15 Pro Max for two years. Following Apple's recommendation to use the 80% charging limit feature, the battery maintained significantly better health compared to previous iPhones charged to 100%. The experiment demonstrates that Apple's built-in battery management tools effectively prolong lithium-ion battery lifespan when used consistently.
Why It Matters
Proves users can trust Apple's automated battery features instead of micromanaging charging habits.