After about 200 recharge cycles, my iPhone’s battery is performing exceptionally well.<\/p>\n<\/div>\n<\/div>\n
Adrian Kingsley-Hughes\/ZDNET<\/span><\/figcaption><\/figure>\n Follow ZDNET: Add us as a favorite source<\/span><\/a><\/span> On Google.<\/em><\/p>\n I’ve been tracking the battery health of my daily driver iPhones for so long that it’s practically second nature. It’s like a weird hobby\/habit I’ve picked up. Ever since I got my iPhone 17 Pro Max, every few days 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’ve decided to ignore caution (and Apple’s battery care tips).<\/p>\n Also: I spent 2 years charging my phone exactly as Apple suggests – where is it all this time<\/strong><\/p>\n Why? Well, I followed all the rules with my previous iPhone. I turned on optimized battery charging, took care not to leave the phone on charge for hours, and also did my best to keep it cool. Despite all this, the battery barely lasted two years and deteriorated so much that it became frustrating to use, and the handset I had planned to keep for three years ended up being replaced after only two years. <\/p>\n So, this time I stopped caring. No fee limits, no fancy customization. I just threw it on any charger or used any power bank that was close at hand. <\/p>\n There was one thing I changed. <\/p>\n I spend a lot of time in cars. And putting my phone on charge is as much of a ritual as putting on a seat belt. <\/p>\n But here’s something that I’ve noticed has become an increasing problem, especially over the last few years. No matter how I charge my phone, whether it’s wired, wireless in the dock, or using the car’s built-in charging pad, my phone always overheats. And I don’t just mean a little hot, I mean HOT. <\/p>\n Also: After testing this Anker, I wish every wireless charger had a thermoelectric cooler<\/strong><\/p>\n Cars are a strange thing. In the summer they’re like greenhouses on wheels, and in the winter we’re putting heat into them to keep them warm. And the purpose of that cooling and heating is to keep humans comfortable. The phone is usually on the dash, in the window, in front of a vent, or in a crack. <\/p>\n It’s a hard life for a phone. <\/p>\n The dreaded “Charging on Hold” message.<\/p>\n<\/div>\n<\/div>\n Adrian Kingsley-Hughes\/ZDNET<\/span><\/figcaption><\/figure>\n Another thing I noticed is that I’ve only seen my iPhone enter “charging on hold” mode (a mode where it stops charging to cool down) when it’s on charge in the car. I haven’t noticed this happening when it’s connected to a power bank, or when it’s charging on my nightstand. <\/p>\n This happens only when he is in the car. <\/p>\n Heat is harmful to batteries, and Extreme heat is known to accelerate chemical corrosion<\/a>Which leads to premature failure. <\/p>\n Apple has a lot to say on the subject of summer<\/span><\/a><\/span>. <\/p>\n Also: iPhone charging slowly? 6 Quick Solutions Worth Trying Before Blaming Your Battery<\/strong><\/p>\n iPhone (and iPad, iPod, and Apple Watch) all work best at 32\u00b0 to 95\u00b0 F (0\u00b0 to 35\u00b0 C), and the company warns that “It is especially important to protect your device from exposing it to ambient temperatures above 95\u00b0 F (35\u00b0 C), which could permanently damage battery capacity.” <\/p>\n The interior of a car can very quickly reach the point where it is bad for the battery (and humans!). here is one calculator<\/a> Based on a study from Stanford University School of Medicine. Even on a day with mild 70\u00b0F (21\u00b0C) temperatures, the car’s interior can reach 104\u00b0F (40\u00b0C) in just 30 minutes, and 113\u00b0F (45\u00b0C) after an hour. Increase the temperature to 75\u00b0F (24\u00b0C), and the internal temperature will reach 118\u00b0F (48\u00b0C) in one hour. And a Texas summer high of 98\u00b0F (37\u00b0C) will raise the internal temperature to 123\u00b0F (52\u00b0C) in half an hour. <\/p>\n Also: 12+ iPhone Settings You Can Change to Improve Its Battery Life (iOS 26 and Older)<\/strong><\/p>\n Batteries are going to die – you can’t change the laws of physics – but you can give them a fighting chance. Apple itself warns that high temperatures can permanently reduce battery capacity (which is why iPhones go into “charging on hold” mode when things get too hot). <\/p>\n So, I decided to stop charging my phone in the car altogether. Well, almost. I’ll get to the exceptions in a moment. <\/p>\n This small change seems to bring appreciable change. My iPhone is currently at 196 recharge cycles, and the battery health is still at 100%. This is impressive, with Apple claiming that the new iPhone batteries are designed to retain up to 80% of their original capacity after 1,000 full charge cycles. <\/p>\n My iPhone’s battery is doing fine!<\/p>\n<\/div>\n<\/div>\n ZDNET Highlights <\/h3>\n
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car charging dilemma <\/h2>\n
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heat is the enemy of batteries <\/h2>\n
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results so far <\/h2>\n
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