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I stopped this common charging habit that was quietly killing my iPhone's battery

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Why This Matters

This article highlights the importance of managing heat during charging, especially in cars, to prolong battery health. It challenges conventional charging habits and emphasizes that overheating, rather than usage patterns alone, significantly impacts battery longevity for iPhones. Consumers and the tech industry should prioritize thermal management to enhance device lifespan and performance.

Key Takeaways

After close to 200 recharge cycles, my iPhone's battery is doing exceptionally well. Adrian Kingsley-Hughes/ZDNET

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ZDNET's key takeaways

Excessive temperature is a key factor in premature battery wear.

Car charging is the perfect storm when it comes to overheating.

You can still charge in the car, but you have to take some precautions.

I've been tracking the battery health of my daily driver iPhones for so long now that it's practically second nature. It's like a weird hobby/habit that I've picked up. Every few days since I got my iPhone 17 Pro Max, I've been firing up the Settings app and taking a look at my battery stats. I'm particularly curious because, with this handset, I decided to throw caution (and Apple's battery care tips) to the wind.

Also: I spent 2 years charging my phone exactly how Apple suggests - here's where it's at now

Why? Well, I followed all the rules with my last iPhone. I turned on Optimized Battery Charging, was careful not to keep the phone on charge for hours on end, and even did my best to keep it cool. Despite doing all this, the battery barely lasted two years before it became so bad it was frustrating to use, and a handset I'd planned on keeping for three years got replaced after only two.

So, this time around I stopped caring. No charge limitation, no fancy optimizations. I just threw it on whatever charger or used any power bank that was close to hand.

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