Technologies

iPhone 17 vs. iPhone Air Battery Test Showdown: I Just Crowned A New Winner

I’ve got exclusive CNET data for three years of iPhone models. See how the latest phones rank historically.

Key takeaways:

The iPhone 17 Pro Max has outstanding battery life that easily lasts all day with charge to spare.
Our exclusive lab data shows you don’t need to pay over a grand for excellent battery life. The $829 iPhone 17’s battery lasts just as long as the $1,099 iPhone 17 Pro.
The ultrathin iPhone Air, with a modest battery capacity, outlasted Samsung’s premium Galaxy S25 phones.

I’ve been reviewing smartphones at CNET for nearly a decade. If there’s one feature people consistently want in a new iPhone or Android phone, it’s longer battery life.

When Apple launched the new iPhone 17 series and iPhone Air, it spent considerable time touting the longer battery life of the iPhone 17, 17 Pro, and 17 Pro Max, as compared to their predecessors.

My fellow CNET reviewers and I have now had the chance to test those claims.

When introducing the iPhone Air and its super slim design, Apple showed a slide during its keynote stating that it has all-day battery life. However, the company undercut its claim on the next slide when it announced a new MagSafe battery pack designed for the Air, which fed into fears that a thinner design might indicate a significant sacrifice to battery life.

Your phone’s battery life is affected by multiple variables, like how bright you keep your display or if your phone has a weak signal from your carrier. How you use your phone has a big impact, too. Someone who is obsessively online will have a much different experience with their battery life than someone who has their phone in their bag at work and checks it on breaks.

So, how do you know whether the battery life is good on the iPhone Air and iPhone 17 series?

CNET tested the new Apple phones’ battery life three ways: through an anecdotal stress test, a video streaming test and observing battery life after everyday use. We also tested wired and wireless charging. Our lab data showed strong battery life for the iPhone 17, 17 Pro, 17 Pro Max and even the Air, especially compared to older iPhone models.

The iPhone 17 Pro Max has excellent battery life

Bigger batteries don’t always mean superior battery life. There’s more to battery life than the physical size or capacity. Besides Huawei, Apple is the only major smartphone maker that builds its own hardware and software and can tune its phones to work off smaller batteries than most Android phones have.

The iPhone 17 Pro and 17 Pro Max have larger batteries than last year’s 16 Pro and 16 Pro Max. If you’re using an eSIM-only version of either phone, like the iPhone models sold in the US, your battery is even bigger because it takes up the space where the SIM card tray would be.

Frustratingly, Apple doesn’t share the capacity of the iPhone’s batteries, and part of the reason is that its batteries are often smaller than those in Android phones. Fortunately, the EU requires that Apple publish energy labels that include the capacity of its batteries on its site. Macrumors found the capacities for eSIM-only models. You can see how the new phones’ batteries compare to the ones in the iPhone 16 series:

iPhone Air: 3,149 mAh
iPhone 17: 3,692 mAh
iPhone 17 Pro: 4,252 mAh
iPhone 17 Pro Max: 5,088 mAh
iPhone 16: 3,561 mAh
iPhone 16 Plus: 4,674 mAh
iPhone 16 Pro: 3,582 mAh
iPhone 16 Pro Max: 4,685 mAh

CNET has two benchmark tests (video streaming and stress tests) that allow us to compare the battery performance of one phone against another. And because we’ve been using these tests for years, we can also compare a new phone against older models.

For example, if you have an iPhone 15 and are considering upgrading to an iPhone 17, we can tell you that the new iPhone will have a longer battery life out of the box than your old one.

In CNET’s 3-hour video battery test, where we streamed a video over Wi-Fi with the screen at full brightness, the iPhone 17 series did terrific, even if the results were not dramatically better than the iPhone 16 series.

Without a Plus model this year, the iPhone 17 Pro Max is the only model with a big battery (the biggest one ever in an iPhone), and it only lost 9% in the test. The lower the percentage lost, the better. This is the first time an iPhone stayed in single digits, and I should note that the 17 Pro Max tied the Motorola Razr (2024) for the best score since we’ve been running the test. The Razr has a less powerful processor and a smaller main screen with a lower resolution and less brightness.

The iPhone Air and 17 Pro dropped 15% in the test, the same as the iPhone 15. And the iPhone 17 lost only 11%, better than the iPhone 15 and 16.

Something to keep in mind is that the iPhone 17 has a 6.3-inch screen that supports a 1-120Hz variable refresh rate and a max brightness of 3,000 nits, compared to the iPhone 15 and 16, which have a 6.1-inch display with a 60Hz refresh rate and a max brightness of 2,000 nits.

The new Apple phones did well in CNET’s 45-minute endurance test, during which I played games, streamed videos, scrolled social media and took a video call. The 17 Pro Max only dropped a single percent, the best result this year, but behind the iPhone 16 Plus, which stayed at 100% (the best result for any phone).

The iPhone 17 and 17 Pro had the same result, dropping 2%, making the standard iPhone 17 look even more like an incredible value. The iPhone Air dropped 5%, which matches the iPhone 15 in the same test. For perspective, the Air did better in this test than the Samsung Galaxy S25 series and tied with the Motorola Razr Ultra.

The iPhone Air gets through a day

When we review phones, we set them up as our daily driver to use and test them like our personal phones. Real-world testing is often the best indicator of what a reader can expect to get from a phone.

I started each day with a full battery for the iPhone 17 Pro and 17 Pro Max and tracked how much battery I had throughout the day. I ended each day with plenty of battery left — even after shooting photos and videos or keeping the screen at full brightness while filming the review video. Below is a chart that shows how the iPhone 17 Pro Max’s battery performed for the first five days I had it.

Similarly, CNET senior technology reporter Abrar Al-Heeti highlights that the iPhone Air she reviewed regularly ends the day with about 20% to spare (after starting with a full battery). She said it would drop below 20% on heavier-use days by the time she was ready for bed.

“Impressively, the iPhone Air has consistently lasted all day over the last several weeks I’ve been using it,” Al-Heeti said. “But I’ve hardly had to touch that MagSafe battery pack to extend battery life during the day, which is reassuring.”

In our testing, a fully-charged MagSafe battery added 69% to the iPhone Air’s battery. When I asked her whether she’d recommend people buy the $99 MagSafe Battery for the Air, Al-Heeti said that she recommends it for someone who uses their phone often and doesn’t want to hunt for an outlet.

“I don’t like the idea of having to lug around an extra battery, no matter how thin or sleek it is, so I don’t tend to carry it with me unless I know I’m going to have a long day away from home,” Al-Heeti said.

She also reviewed the standard iPhone 17 and said it can easily last a little over a day, even after snapping photos, scrolling through social media, listening to audiobooks and music, texting and watching videos.

Al-Heeti’s review notes that over several days, she’d start with a full battery, between 8:30 and 9:30 a.m., and have 44% to 47% of a charge 12 hours later. If she didn’t recharge the iPhone 17 overnight, she’d still have about 30% to spare the next morning.

The iPhone 17 series charges fast

There are two ways to charge an iPhone: with a cable or with MagSafe (unless it’s the iPhone 16E, which doesn’t have MagSafe, just Qi charging). For wired charging, Apple recommends using a 40W charger with the iPhone 17, 17 Pro and 17 Pro Max and a 20W charger for the iPhone Air. However, Apple doesn’t include a charger in the box, just a USB-C cable, but the company does sell a 40W charger for $39 and a 20W charger for $19.

In our 30-minute wired charging test, the new phones, including the Air, did well. The iPhone 17, 17 Pro and 17 Pro Max added 10% or more than the iPhone 16, 16 Pro and 16 Pro Max in the same test. Apple says the 17 Pro and 17 Pro Max can recharge to 50% in 20 minutes. In our tests, the iPhone 17 Pro hit 53% and the iPhone 17 Pro Max hit 49% after 20 minutes.

The iPhone Air reached 49% in our 30-minute charging test with a 20W adapter, the same as the iPhone 16 and iPhone 15 Pro, beating the iPhone 15 Plus.

In wireless charging or MagSafe charging, we ran a 30-minute test with the latest MagSafe charger and a 30W power adapter. The iPhone 17 series and Air beat every iPhone we’ve ever tested except the iPhone 16 Pro, which did better than the Air and standard iPhone 17. I should note that iPhones don’t come with a MagSafe charger or 30W adapter in the box.

Which iPhone should you buy based on CNET Labs data?

Get the iPhone 17 Pro Max if you want the best battery life. The standard iPhone 17 has great battery life and inches out the more expensive iPhone 17 Pro. And if you’re on Team Air, know that the battery life isn’t great, but depending on how hard you use it, you should get through a day on a single charge.

I should also note that iOS 26 has a new Adaptive Power mode. This feature learns your phone’s use patterns and “adapts” how much power the processor uses for specific tasks, so it draws less from the battery. The new feature takes a week to start working. I turned it on after running CNET’s battery tests and will update this story with any changes or improvements that come from it.

Last, if you have an iPhone and the only issue is that its battery doesn’t charge as much as it used to, think about replacing it with a new one. Doing so will not only be hundreds of dollars cheaper than a new iPhone, but it can extend your phone’s life another couple of years.

Technologies

G10’s ‘surprise’ currency star could stumble as peers hike interest rates

The British pound has benefited from a resilient economy and rate hike expectations, but the BOE looks increasingly dovish while a crucial budget lies ahead.

The British pound has largely shrugged off another change of government and geopolitical shocks to outperform many of its peers this year, but the currency’s recent weakness could be set to deepen.

Sterling has gained around 1.6% against the euro

It is near-flat against the U.S. dollar

The resignation of Prime Minister Keir Starmer on July 20 left Britain facing its seventh leader in 10 years, with markets watching closely whether a new administration would hold to the “fiscal rules” repeatedly emphasized by former Finance Minister Rachel Reeves.

U.K. borrowing costs have risen under Starmer’s quickly appointed successor Andy Burnham, also of the center-left Labour Party, but that has occurred in lockstep with a global government bond sell-off.

Matthew Ryan, head of market strategy at financial services firm Ebury, said that a “clean and orderly transition of power” had “removed a potential banana skin and eased the perceived political risk premium attached to the pound.”

Britain’s long-term borrowing costs are the highest since 1998

In a Friday note, Ryan said sterling had been “the surprise outperformer” among the G10 group of wealthy nations over the past three months, tying this to an unexpectedly resilient U.K. economy.

Gross domestic product grew by 0.4% in the second quarter, following 0.6% expansion in the first quarter — one of the strongest performances among advanced economies. Sunny weather and excitement around the FIFA World Cup boosted consumer spending, while business activity remained surprisingly resilient despite the volatile geopolitical backdrop.

The pound also drew support at the start of the Iran conflict in April on outsized market expectations for a monetary policy response to inflation fears from the Bank of England, Jane Foley, senior FX strategist at Rabobank, told CNBC.

The U.K. is highly vulnerable to higher oil and gas costs, both of which have spiked this year, helping push headline inflation near 3%.

Sterling weakness ahead?

Despite the resurgence of price pressures, the Bank of England has held its key interest rate at 3.75% throughout this year.

Current market pricing suggests low odds of a rate hike at its September meeting. In contrast, there are high expectations for a hike by the European Central Bank on Wednesday and, increasingly, the Federal Reserve later this month.

Central bank rate hikes typically boost their home currency.

Dovish messaging by the BOE on Sept. 17 would “further expose the pound” just before markets get anxious for the first annual budget announcement of Burnham’s administration on Oct. 28, Foley of Rabobank noted.

New U.K. Finance Minister John Healey said in a Monday speech that he would remain committed to fiscal discipline, while targeting a more even distribution of economic growth around the country — in contrast to the concentration of growth in powerhouse London.

JP Morgan U.K. economist Allan Monks said his remarks suggested a cautious approach to tax and spending changes given the backdrop of higher borrowing costs. The budget is likely to retain a focus on devolution, greater public control of public services and more private sector partnerships, but contain little to change the macro outlook, Monks said in a note Monday.

Ebury’s Matthew Ryan said the budget contained a high level of political risk, and was likely to contain “a combination of higher ancillary tax rates and an increase in debt issuance in order to fund Burnham’s spending ambitions.”

These could include changes to taxes on property purchases and local council duties, an introduction of a “mansion tax” and tighter pension and personal investment account relief, he said, adding that markets would be jumpy over anything that looked likely to dampen growth and squeeze the private sector, while simultaneously requiring more borrowing.

Technologies

Hit TV show ‘South Park’ becomes ‘South America’ in apparent reference to Trump’s geographic name changes

Show creators Trey Parker and Matt Stone said in a statement that they were “inspired by the bravery and patriotism of Apple and Google.”

Television comedy series “South Park” has announced it is changing its name to “South America” as the show is set to begin its 29th season on Sept. 16.

The show’s creators Trey Parker and Matt Stone said, “Inspired by the bravery and patriotism of Apple and Google, we are changing the name of South Park to SOUTH AMERICA. We especially want to thank our parent company Paramount — a Skydance Capitulation.”

Parker and Stone’s statement comes after U.S. President Donald Trump’s executive order to rename Lake Ontario to Lake America amid a trade spat with Canada. Canadian officials said they will not recognize the new name.

Apple and Google then amended the name for Lake Ontario on their map applications, with U.S. users seeing “Lake America,” while Canadian users saw “Lake Ontario.”

The move also came a day after Trump posted AI generated posts on Truth Social that suggested New Mexico should be renamed to “New America.”

Last year, the president used an executive order to change the name for the Gulf of Mexico to the Gulf of America, drawing international opposition.

“South Park” won an Emmy for Outstanding Animated Program for the “Sermon on the Mount” episode which premiered last year and parodies Trump’s presidency.

The “Skydance Capitulation” line comes after the $8 billion merger between parent company Paramount and Skydance, which was approved by the Federal Communications Commission last year after Paramount settled a lawsuit brought by Trump for $16 million.

Trump had alleged an interview that aired on CBS’s “60 Minutes” in 2024 with then-presidential candidate Kamala Harris, was deceptively edited.

Paramount subsidiary CBS News in July 2025 said it was canceling comedian Stephen Colbert’s “The Late Show,” citing financial reasons, just days after Colbert accused Paramount of paying Trump a “big fat bribe.” The final episode of the show aired in May.

Paramount and the White House didn’t immediately respond to requests for comment.

Technologies

Trump Claims No Regret Over Initiating Iran Conflict Amid Rising U.S. Economic Sanctions

Trump insists he has no regrets about initiating the Iran conflict, warning that a nuclear-armed Iran would threaten Israel and U.S. cities, while the administration ramps up economic sanctions. He predicts the war will end after the midterms, even as markets brace for a prolonged standoff.

U.S. President Donald Trump said he has no regrets about starting the Iran war and added that “If I had it to do again, I would do exactly what I did.” Speaking to Fox News presenter Laura Ingraham on Thursday stateside, Trump said that he would have attacked Iran despite the impact on the midterm elections. “If we hadn’t done Iran, you would be cruising to midterms victory right now,” Ingraham told Trump, to which Trump replied “supposing we were cruising, and all of a sudden Iran has a nuclear weapon. They would use it.” He added that if Iran had a nuclear weapon, the Islamic Republic would “wipe out” Israel and the Middle East, and start hitting U.S. cities.

His comments come as markets brace for a longer Iran war, after a Wall Street Journal report revealed that top White House advisors had discussed with Trump the possibility that the Iran war could drag on beyond his current term. Trump has said that the war will end immediately after the midterm elections and oil and gas prices will also fall, adding to his months-long claims that the conflict will end soon.

In separate comments to NewsNation on Thursday, Trump denied reports that there was any damage to U.S. assets, after Iran claimed it had hit multiple U.S. fighter aircraft at a base in Jordan. “No damage. No nothing,” Trump said, when asked if there was any truth to the reports.

Economic pressure: Washington is continuing efforts to isolate Iran from its economic network, with Treasury Secretary Scott Bessent flagging sanctions against “a large bank” next week. “We’re going to do it on Monday because we want to honor the memory of our fallen citizens on 9/11. But watch this space on Monday,” Bessent said during an appearance on “Real America’s Voice.” Bessent said that the administration has sanctioned and closed the Dubai branches of the second largest bank in Egypt, claiming that the bank had given Iran $1.8 billion dollars. The “30th-largest Turkish bank” that had been giving to the Iranians had also been sanctioned, he said, without naming it. The U.S. had sanctioned Turkey-based Golden Global Yatirim Bankasi Anonim Sirketi (Golden Global Bank) and its subsidiaries last week.

Trump, in the NewsNation interview, was also asked how Iran could continue holding out under the current economic pressure. “I don’t know that they’re gonna be able to hold out,” Trump said. “But it’ll get settled after the elections. Or maybe sooner. But it’ll get settled right after the election.”

Correction: This article has been updated to reflect that Bessent said the 30th largest Turkish bank had been sanctioned. An earlier version misstated the bank’s ranking.