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Out of all our tech gadgets, it is secure to say we use our telephones essentially the most. By extension, its battery life is without doubt one of the most essential elements when contemplating which cellphone to purchase or improve to. So which cellphone has the perfect?
To search out out which smartphone battery reigns supreme, ZDNET examined 17 telephones from six manufacturers together with Apple, Samsung, and Google, in two testing strategies. The one cellphone that stood out above the remainder in all our battery-life testing was the OnePlus 15, which is why it will get the ZDNET Lab Awards badge.
Additionally: The perfect telephones you should buy proper now
One other cellphone that impressed us was the iPhone 17 Professional Max, which tied with the OnePlus 15 basically utilization testing. This is the total break down of our findings and the way we often check smartphones.
How we examined the telephones
Our two testing strategies centered on measuring battery life after video playback and through common use. For the video playback testing (Determine 1), we left a three-hour YouTube video on and tracked the battery proportion over one, two, and three hours.
Telephone display brightness was set to 100%, and auto-brightness and dimming had been disabled. As well as, we used Wi-Fi solely, notifications had been turned off, quantity was set to 50%, and the best refresh charge was turned on.
Check 1: Video playback over three hours
Our common utilization testing consisted of half-hour of utilizing a smartphone for common use circumstances, together with 10 minutes of social media searching (Instagram and Reddit), 10 minutes of gaming (Asphalt 9), and 10 minutes of video calling (Google Meet on iOS and Android for consistency). Battery life was then tracked after these half-hour.
Additionally: How we check telephones at ZDNET
To get an thought of a particular model’s common battery life, we averaged the overall utilization numbers for every cellphone in a model to get the info within the graph under (Determine 2).
Check 2: Basic utilization over half-hour
ZDNET’s editor-in-chief and smartphone knowledgeable, Kerry Wan, mentioned there have been some variables to think about in his testing, equivalent to peak brightness ranges (which hover round 2,000 nits), refresh charges (60 to 120Hz), and battery dimension.
“One interesting point is that the OnePlus 15 is the only phone that we tested at the lab with a silicon-carbon battery, allowing it to store a higher capacity in a casing that’s similar to conventional Lithium-ion batteries,” Wan mentioned.
The outcomes
The OnePlus 15 got here out because the winner in each of our testing strategies, with the best battery life proportion after one (98%), two (94%), and three hours (89%) of operating video playback.
Learn the assessment: OnePlus 15
For common utilization, the OnePlus 15 had a battery lifetime of 98%. Notably, the iPhone 17 Professional Max tied with the OnePlus 15 basically utilization testing.
On the whole, we discovered the three telephones in Apple’s iPhone 17 lineup to have the second-highest battery life averages (97.3%), operating shut behind OnePlus’ 97.5% common, though these are the one two OnePlus telephones we examined.
Wan mentioned it is no shock that Apple’s newest iPhones have spectacular battery lives, thanks to some key updates.
“Having reviewed the latest iPhones, I’ve always found them to have the best standby battery, thanks in part to Apple’s aggressive approach to memory and background tasks management,” he mentioned, including, “Pair that with the largest battery capacity found on an iPhone, and you’ve got the 17 Pro Max model dropping the least percentage within the 30-minute general usage test.”
As you possibly can see from the spec chart above, not all smartphones did properly in our testing. The Motorola Razr scored the bottom battery proportion within the video playback testing, and the Google Pixel 10 Professional Fold did not impress both. That is to not say these aren’t good telephones, however that in comparison with different fashions in the marketplace, their batteries aren’t as succesful.
Your expertise with a cellphone’s battery, after all, would possibly differ from our testing, relying on what apps you employ essentially the most (Fb, Instagram, and Snapchat are all battery-draining apps ), your charging habits, if you happen to use darkish mode vs. gentle mode, wi-fi options operating within the background, and extra.
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However if you happen to’re seeking to improve your cellphone this yr, remember to test our testing outcomes earlier than making your determination to make sure your new cellphone has a strong battery life.
Our high decide for the perfect smartphone general is the Samsung Galaxy S25 Extremely because of its because of its immersive and vibrant show, dependable battery life, and wealth of particular options, a few of that are powered by the corporate’s newest generative synthetic intelligence (AI) mannequin.
Additionally: The perfect Samsung telephones to purchase in 2026
In our testing, the Samsung Galaxy S25 Extremely got here in fourth place for video playback out of the 17 telephones examined. It has a common utilization battery lifetime of 96%, which is on par with the opposite model’s flagship fashions.
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The typical cellphone battery lasts about 22 hours on a full cost, which is nice for staying linked on commutes, work flights, and evenings at residence. However that is simply the common. Precise use time varies by cellphone mannequin, battery capability, the facility effectivity of its processor, and what you are utilizing your cellphone for.
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