Technologies
I Replaced My iPhone Battery Myself at Home and You Can Too
You can DIY your own phone battery replacement and save a ton of money in the process. Here’s how.
If you’ve got an iPhone 17, a Google Pixel 10 Pro or a Galaxy S25 Ultra, you won’t need to worry about the age of your battery for at least a few years. But batteries do age over time so if you have a much older iPhone or an old Android phone, you may well find that your battery no longer gives you the same battery life it did when it was new. But having an old, worn-out battery doesn’t mean buying an altogether new phone; it’s surprisingly simple to just replace the battery.Â
Apple has its own do-it-yourself repair program, but even if you don’t use that, you can replace your iPhone’s battery yourself at home. With affordable third-party components and various tools available to buy, you can open up your iPhone and swap out that old, worn out battery — or replace a broken screen — often for less money than having a company do it for you.Â
I did exactly that, replacing the old battery of a well-used iPhone 6 to give it a new lease on life. I was pleased to find the phone on eBay for only ÂŁ75 (about $100 or AU$140) back in 2020. That’s a lot less than a new iPhone 17 Pro, but unfortunately the battery had aged to the point where the software had to artificially throttle the performance to stop it from shutting down. Instead of casting off the phone and getting buyer’s remorse, I decided to purchase a replacement battery and tools from iFixit and have a go at changing out the battery myself.
It took a little over an hour, but I was able to safely swap out the battery and get the iPhone 6 running perfectly again. I’m not giving step-by-step instructions here — head to iFixit and grab a kit if that’s what you’re after — but I do want to describe my experience, including how easy the process was, and hopefully answer some of the questions you may have if you also need a new battery.
If you have a more recent model (an iPhone 12 or newer), then make sure to first check Apple’s new repair options and see if you’d be able to put in a replacement with parts directly from the company.Â
Note that any maintenance you do on your own devices is entirely at your own risk.
To get more about iPhones, check out everything Apple announced at WWDC 2025.
1. Why would you need to replace an iPhone battery?
Batteries age over time, and considering that the iPhone 6 was released years ago, it’s no surprise that the one I bought wasn’t running in prime condition. One time, the phone unexpectedly restarted while in use, and it flashed a warning that read, “This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to help prevent this from happening again.” Even the phone itself knew it had a bum battery.
In short, a phone’s performance can be throttled if it can no longer cope with power demands. There is the option to turn throttling off, but this will result in more frequent crashes. Neither situation is ideal, so a battery replacement seemed like a smart way forward for me, since it wasn’t my main phone and I was willing to take the risks.Â
2. How much does a replacement iPhone battery cost?
The problem with my situation specifically was that I bought the phone for so little in the first place that spending more money on a battery replacement service negated some of those initial savings. Apple’s replacement service costs ÂŁ49 ($49), which is more than half what I paid for the iPhone 6 I bought. As I was in the middle of a coronavirus lockdown when I attempted this, I wasn’t able to get to an Apple store to take it in, and sending it in through the mail would bring the total cost to around ÂŁ56 (about $75 or AU$105).
iFixit, however, sells a DIY replacement pack for ÂŁ35 (including postage to my home in Scotland). It costs $30 in the US, and with shipping costs that comes to about $38. It’s not a huge saving over Apple’s replacement, but every little bit helps. It also means you will still have the tools you need should you want to do this again in the future. All you’d need to buy next time is the battery.
3. What comes in the iFixit battery fix kit?
iFixit’s kit comes with a third-party replacement battery that is not from Apple, since Apple does not sell its parts separately for phones older than the iPhone 12. It also has all the tools needed to open the phone and remove the old battery. The only additional thing I needed was a hair dryer to heat up and remove the glue.
4. Does replacing a battery void your phone warranty?Â
Opening up an iPhone will void the warranty, but if your battery is old enough to need replacing, odds are you’re already out of the 12-month warranty period.Â
5. Is it safe to replace your iPhone battery yourself?Â
This one isn’t so straightforward to answer. iFixit’s guide gives very detailed instructions on the steps involved, but there were a couple of points that made me nervous. One step involved heating up the back of the phone with a hair dryer in order to loosen the glue holding the old battery in place.Â
Specifically, it said to heat it to “slightly too warm to touch comfortably,” which I found a little vague. Especially since that section also warned that “overheating the iPhone may ignite the battery.” But how hot is too hot? What signs would I see if it was overheating? I couldn’t find this information, and as such wasn’t sure how close to overheating it I might be.
Shortly after, while trying to pry out the old battery, I accidentally ripped into what looked like the black wrapping around that battery. I was pretty sure that the battery itself wasn’t punctured — there was no smoke or hissing — but I’d have felt a lot more comfortable if I had “emergency” instructions on hand about what to look out for and what to do if the battery did ignite.Â
6. Can I replace my iPhone battery myself?
Up to a point I found I could, and I’m not the best at DIY. iFixit’s instructions were easy to follow, and there were only seven internal screws to remove, which were easy to then put back.Â
One thing I found confusing was that the instructions on iFixit’s website end at the point where you remove the old battery. The only instruction in the conclusion was to follow the previous steps in reverse order. Admittedly, that wasn’t particularly difficult, but I would have appreciated more guidance at that point.Â
I ran into one other issue in the process: When I removed the screen, I cracked the screen protector that was in place. I noticed the hairline cracks and was worried that I’d damaged the display itself, but thankfully that was unharmed.
7. Is it worth replacing an iPhone battery?
It depends on the age and value of your phone. If, like me, you bought a cheap used iPhone and just want to get it back up to speed, then it could be a great way to breathe new life into old tech without spending a fortune. Bear in mind, though, that this wasn’t going to be my main phone, nor did I buy it with my own money. For me, the risk was low. If I’d made a mistake and ruined the phone, it wouldn’t have been a big problem. You’ll need to consider whether you really can manage without the phone, and weigh your tolerance for other risks.
If you’re using a more recent device, like an iPhone 14 or 15, for example, I’d just take it directly to Apple. The savings you’ll get from doing it yourself aren’t so great as to justify the potential cost of damaging a more valuable phone.
Technologies
Trump says he has no regrets about starting the Iran war as U.S. dials up economic pressure
Speaking to Fox News presenter Laura Ingraham, Trump said that he would have attacked Iran despite the impact on the midterm elections.
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 on 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.
Technologies
U.S. diesel price tops $6 per gallon, a record high as Ukraine and Iran wars ripple through economy
U.S. diesel prices hit their highest level ever as fuel supply disruption stemming from the Ukraine and Iran wars lifts transportation costs.
U.S. diesel prices hit $6 per gallon on Friday for the first time ever, as fuel supply disruptions triggered by the Ukraine and Iran wars raises transportation costs across the entire economy.
Truckers and farmers are paying about 63% more to fill up their semis and tractors than they did at this time last year, according to data from AAA. The average price nationwide is now about $6.06 per gallon.
Prices are even higher in California, the biggest agriculture state in the U.S., at $7.98 per gallon.
Fuel costs are rising as crude oil prices have surged in response to a sharp escalation in fighting between the U.S. and Iran this month. U.S. crude oil futures topped $100 per barrel on Thursday for the first time since May. The contract has gained about 20% in September.
Diesel is the real lifeblood of the economy even though consumers tend to pay more attention to retail gasoline prices, said Bob McNally, president of Rapidan Energy, in an interview with CNBC’s “The Exchange” on Tuesday.
Higher diesel prices are passed down to consumers in what they pay for food, consumer goods and energy. Diesel fuels the trucks, trains and ships that bring goods to market. It powers the machinery that farmers use to plant and harvest food. And it heats homes and generates electricity in some cases.
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“It’s the more insidious, more costly, and more impactful fuel,” McNally said. “As we climb higher, it is a real concern.”
Diesel prices at these levels will be a “silent killer” for the economy, said Patrick De Haan, head of petroleum analysis at GasBuddy, in an interview with CNBC’s “Power Lunch” Tuesday.
Gasoline prices, meanwhile, have never been this high this late in the year, De Haan said. Prices at the pump hit a Labor Day record of $4.15 per gallon earlier this week. Americans are spending about $700 million more per day on gas and diesel than they did a year ago, the analyst said.
“There’s sticker shock there for consumers,” De Haan said.
Fuel costs are rising as the Iran and Ukraine wars have disrupted global supplies. Kyiv has pounded Russian refineries, forcing Moscow to ban diesel exports. Iran and its militant Houthi allies in Yemen have also hit the refineries of U.S. Gulf allies. Fuel exports through the Strait of Hormuz are constrained due to the Iranian attacks on tankers.
The wars in Eastern Europe and the Middle East have shut down refineries with about 5 million barrels per day of capacity, said Valero Chief Operating Officer Gary Simmons on the U.S. refiner’s July 30 earnings call.
The world has lost nearly 8% of its diesel supply with little spare refining capacity available to make up the shortfall, said Andy Lipow, president of Lipow Oil Associates, in a Wednesday note.
Rising diesel prices pose an “enormous challenge” for the Trump administration, said Helima Croft, head of global commodity strategy at RBC Capital Markets, in a Sept. 4 interview with CNBC’s “Power Lunch.”
“U.S. refineries are running at 98% utilization rates — there is just no spare capacity,” Croft said.
Technologies
Buffett’s confidence in troubled decade-old acquisition finally pays off
Warren Buffett has said he paid too much for Precision Castparts in 2016. Now its complex metal castings are in high demand.
(This is the Warren Buffett Watch newsletter, news and analysis on all things Warren Buffett and Berkshire Hathaway. You can sign up here to receive it every Friday evening in your inbox.)
Buffett’s confidence in troubled decade-old acquisition finally pays off
Six years ago, when Berkshire Hathaway took an $11 billion write-down of its $37.2 billion 2016 acquisition of Precision Castparts, Warren Buffett wrote in his annual letter to shareholders he had paid “too much” for the company, which makes “complex metal components and products.”
While it was a “fine company – the best in its business,” he had been “simply too optimistic” about its profit potential, a “miscalculation … laid bare” by the enormous downturn for the aerospace industry, Precision Castparts’ largest customers, amid the Covid pandemic.
In a CNBC interview when the deal was first announced, Buffett admitted it was “a very high multiple for us to pay,” but told shareholders at the 2016 meeting he had great confidence in Mark Donegan, the company’s CEO, both then and now, and the company’s long-term profit outlook.
It’s taken longer than he planned, but Buffett’s purchase is now looking pretty good.
As Reuters puts it, there is currently a shortage of the “complex” products Precision Castparts makes that are essential for engine turbine blades.
They’re also used in natural gas turbines, which are in demand to produce energy for artificial intelligence data centers.
This week, GE Aerospace announced it would pay $11.75 billion to acquire Consolidated Precision Products, one of the few companies that competes against Precision Castparts.
Barron’s calls that “pricey” at 26 times projected 2027 earnings before interest, taxes, depreciation, and amortization.
Using the same multiple, Barron’s estimates Precision Castparts is worth around $100 billion. That’s well above the potential value of $60 billion to $75 billion it cited in an article last month that said the unit “probably has become one of the more valuable divisions” of Berkshire.
It’s also nearly three times the 2016 purchase price.
In the Barron’s piece, Andrew Bary said Berkshire, and its share price, aren’t “getting much credit” for the subsidiary’s rising value, in part because CEO Greg Abel, like Buffett, doesn’t do analyst conference calls or investor events that could draw attention to the unit’s performance.
His recommendation: “Without Warren Buffett at the helm, Berkshire may have to start telling its story if it wants to attract a new generation of investors. This year’s trading action suggests that something may need to change.”
Berkshire bounces a bit as Wall Street sells off
Berkshire Hathaway shares managed a modest gain this week even as Wall Street’s major averages declined, a small departure from the 2026 “trading action” Bary cites.
Both the Class A and Class B shares gained almost 0.9% while the S&P 500 fell by 0.8%.
Until Friday’s bounce, that benchmark index, along with the Dow Industrials and the Nasdaq Composite, had dropped four days in a row as oil and bond yields moved higher.
Even with this week’s outperformance, Berkshire’s B shares still trail the S&P 500 by more than 10 percentage points so far this year.
Nebraska candidate moves to replace ad that included Buffett’s image
The campaign team for the Republican running in Nebraska’s 2nd Congressional District accelerated the deployment of a new campaign ad after Susie Buffett complained about a previous commercial that briefly included an image of her father, Warren Buffett.
In the ad, a picture of Buffett and his name appear on screen for roughly two seconds as candidate Brinker Harding says, “Here in Omaha, we know a thing or two about the stock market, some more than others. But we do it without insider information.”
He then goes on to highlight his call for a ban on Congressional stock trading, saying some lawmakers “trade on secrets you’ll never know,” as they “get rich” while “we barely get by.”
In a report that led its 10 PM CT newscast Wednesday evening, ABC affiliate KETV in Omaha reported Susie Buffett had asked Harding on Sept. 2 to remove the ad.
She told the station, “I think it’s worth it to say that Warren did not give Brinker his permission to use his face or name in his ad.
“It implies that my dad endorses him. He did not have permission to use it.”
The KETV report quoted Harding as saying in a statement, “In Nebraska, we work hard and support each other, and we do it honestly. Warren Buffett exemplifies that, and that was the point of my ad.”
The report said Harding did not comment on whether the ad would be taken down but noted “it does look like new ads from his campaign are beginning to run on some stations.”
A Harding campaign spokesperson told me the campaign did not think its ad implied a Buffett endorsement, but to be respectful to the Buffett family, it responded to her concern by accelerating the rollout of its next planned ad by several days, although its effort was hampered by the Labor Day weekend.
The commercial now running does not show or mention Buffett.
BUFFETT & BERKSHIRE AROUND THE INTERNET
Some links may require a subscription:
– Best’s News and Research Service: 2026 Best’s Rankings: Berkshire Hathaway Takes DPW Top Spot Among Accident & Health Lines
– Financial Times: The day Warren Buffett saved Salomon Brothers
HIGHLIGHTS FROM CNBC’S BUFFETT ARCHIVE
The effects of 9/11 on Berkshire and the insurance industry (2002)
Warren Buffett shares his thoughts on the 9/11 attacks and explains how Berkshire’s insurance companies have started taking terrorism into account when writing policies.
AUDIENCE MEMBER: I know you lost a lot of money as a result of 9/11. But I would like to know how 9/11 changed your life and your investment strategy?
WARREN BUFFETT: It made everybody, I think, in the country aware, I mean, we’ve gone through world wars and all of that, and essentially felt quite protected within these borders.
And I have been quite worried about — Charlie can attest to — you know, the possibility, particularly of some kind of nuclear device in this country, by — probably more likely by terrorists than by some, at least, declared act of war by another state.
And 9/11 made everybody realize that as humans have not progressed, particularly, in terms of how they behave with each other over the years, they have progressed enormously in their ability to inflict damage on those they hate for one reason or another…
In terms of the business aspects of it, in your question, obviously the area at Berkshire that it effects most significantly, by miles, is insurance.
And prior to 9/11, even though we recognized that there could be huge monetary damages that flowed from the activities of what I would call deranged people, we hadn’t really written the contracts in such a way as to either get paid for taking that risk or to exclude the risk. In other words, we were throwing it in for nothing.
We had excluded risk for war. I mean, we knew that we’d seen what had happened in England in the 40s, and so we had taken account of something that some of us had seen with our own eyes, but we didn’t take account of something that we knew was possible, but we just hadn’t seen. And that’s, you know, that’s the human condition, to some degree.
Since September 11th, everybody in the insurance business recognizes that they had exposures that they weren’t charging for, and they either had to exclude those exposures or they had to charge for them.
We have written — first thing we had to do, of course, is we had lots of policies on the books that left us exposed to this, and most of those policies ran for a year, starting at different points. Those have run off to a great degree, but they’re not entirely run off.
The other thing we did was on new policies. We have sold a fair amount, quite a large amount, of terrorism insurance that excludes what we call NCB, nuclear, chemical, and biological, as well as fire following nuclear.
And, we can take a fair amount of exposure to that sort of terrorism, because it doesn’t — it won’t aggregate. It aggregated at the Twin Towers in a way that — World Trade Center — in a way that just about was as extreme as you could get for non-NCB-type activities.
I mean, that was a huge amount of damage done without nuclear, chemical, or biological.
But we can have tens of billions of dollars with NCB excluded throughout a greater New York area, or something, but we can’t have hundreds of billions of exposure that would be exposed, say, to, nuclear activities, because there an act or two, or three, coordinated, could cause damage that would destroy the insurance industry.
And if we had coverage on that, it would destroy us as well.
BERKSHIRE STOCK WATCH
Four weeks
Twelve months
BRK.A stock price: $766,000.00
BRK.B stock price: $510.37
BRK.B P/E (TTM): 12.83
Berkshire Cash as of June 30: $365.5 billion (Down 8.0% from March 31)
Excluding Rail Cash and Subtracting T-Bills Payable: $359.2 billion (Down 3.8% from March 31)
Berkshire repurchased $4.5 billion of its shares in Q2 2026.
BERKSHIRE’S TOP EQUITY HOLDINGS – Sep. 11, 2026
Berkshire’s top holdings of disclosed publicly traded stocks in the U.S. and Japan, by market value, based on the latest closing prices.
Holdings are as of June 30, 2026, as reported in Berkshire Hathaway’s 13F filing on August 14, 2026, except for:
– Mitsubishi, which is as of April 30, 2026
The full list of holdings and current market values is available from CNBC.com’s Berkshire Hathaway Portfolio Tracker.
QUESTIONS OR COMMENTS
Please send any questions or comments about the newsletter to me at alex.crippen@cnbc.com. (Sorry, but we don’t forward questions or comments to Buffett himself.)
If you aren’t already subscribed to this newsletter, you can sign up here.
Also, Buffett’s annual letters to shareholders are highly recommended reading. There are collected here on Berkshire’s website.
— Alex Crippen, Editor, Warren Buffett Watch
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