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246 In-Depth iPhone Battery Experiment Pits Slow Charging Against Fast Charging

MacRumors
Juli Clover @ MacRumors · 11/07/2025 16:19 EDT

In-Depth iPhone Battery Experiment Pits Slow Charging Against Fast Charging

HTX Studio this week shared the results from a six-month battery test that compared how fast charging and slow charging can affect battery life over time.


Using six iPhone 12 models, the channel set up a system to drain the batteries from five percent and charge them to 100 percent over and over again. Three were fast charged, and three were slow charged.

Another set of iPhones underwent the same test, but with charging initiated at 30 percent and stopped at 80 percent, so the iPhones were always in

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