Summary
Which phone has the longest battery life?.. What a thrilling season the competition for flagship phones has been. It begins in early autumn with the debut of devices like the Pixel 8 Pro and iPhone 15 Pro Max, and it continues into the new year with the OnePlus 12 and Galaxy S24 Ultra.
Which phone has the longest battery life?
Since all of the major phone manufacturers have finally launched their flagship models, we can thoroughly evaluate them to see which one will rank highest on our list of the best phone batteries.
Which is the best phone for battery life?
These flagships will need to outperform most phones in our unique battery benchmark test, which averages 10 hours of battery life, in order to be eligible for a seat. How is the battery life of smartphones tested? This is accomplished by calibrating their screens to 150 nits using a light meter, and then executing a software that mimics online browsing over 5G cellular connection. They keep doing this till their batteries run out.
Iterative improvements in battery life have often outperformed their predecessors by an hour. But this graduating class went above and beyond that one-hour boost in battery life. We’ll compare the battery lives of the Galaxy S24 Ultra, iPhone 15 Pro Max, OnePlus 12, and Pixel 8 Pro and determine which one lasts longer, as well as how quickly it charges.
Flagship phone battery life tested
| Phone | Battery size | Battery test result (Hrs Mins) |
| OnePlus 12 | 5,400 mAh | 17:41 |
| Galaxy S24 Ultra | 5,000 mAh | 16:45 |
| iPhone 15 Pro Max | 4,422 mAh | 14:02 |
| Pixel 8 Pro | 5,050 mAh | 10:03 |
The Pixel 8 Pro, which has the lowest battery life, comes in last place with a duration of 10 hours and 3 minutes. Despite having the third-largest battery capacity, the Tensor G3 seems to be the least power-efficient model among the group. Even though it has the poorest battery life in this premier group, it’s still better than the poor 7 hours and 55 minutes of its predecessor. Examined from this angle, it remains a noteworthy advancement for Google.
Which phone is best for long term use?
The iPhone 15 Pro Max, which achieved 14 hours and 2 minutes in our benchmark tests, comes in third. Significant improvements in processing power are made by Apple’s newest silicon, the A17 Pro, which also helps to extend the phone’s battery life. Before shutting down, the previous iPhone 14 Pro Max managed to last for 13 hours and 39 minutes.
With its powerful 5,000 mAh battery, the Galaxy S24 Ultra comes in second in our battle of battery life. Its amazing endurance is due to the exceptional power efficiency of its processor, the Snapdragon 8 Gen 3, which results in a duration of 16 hours and 45 minutes. This is because the battery capacity isn’t as large as that of the Pixel 8 Pro. The newest flagship from Samsung comfortably outperforms both the iPhone 15 Pro Max and its predecessor by more than three full hours.
Which phone battery can last the longest?
Qualcomm is deserving of praise since the Snapdragon 8 Gen 3 raises the bar for our top winner. With an astounding 17 hours and 41 minutes, the OnePlus 12 is the clear winner of our battery endurance test.
Its longer runtime may be attributed to its 5,400 mAh battery, but the Snapdragon 8 Gen 3’s higher power efficiency over previous chipsets accounts for a large portion of it. The fact that the OnePlus 12 outperforms its predecessor, the OnePlus 11, by almost 4.5 hours, is even more astounding and speaks volumes about the improvement in battery life we’re seeing this time around.
If everything proceeds as planned, it’s possible that the next generation of flagship smartphones will get closer to passing our 20-hour battery benchmark test. Although there hasn’t been much advancement in battery technology for phones today, much of the benefits we’re seeing are because of these processors’ optimizations.
Tested flagship phone battery recharge
| Phone | Recharge percentage (15 mins) | Recharge percentage (30 mins) |
| OnePlus 12 | 60% | 100% |
| Galaxy S24 Ultra | 39% | 71% |
| iPhone 15 Pro Max | 20% | 41% |
| Pixel 8 Pro | 29% | 59% |
Obviously, it helps to have more petrol in the tank, but having a phone that charges rapidly also helps. Fortunately, a lot of flagships use their proprietary fast charging technology to quickly charge their batteries to a respectable level.
Despite the positive reception that Apple’s adoption of USB-C received, the iPhone 15 Pro Max still requires a considerable amount of time to charge. In reality, after 30 minutes of charging, it reaches 41%. This is a result of its 20W wired charging pace, which is glacial compared to flagship devices.
The Google Pixel 8 Pro is the next device on the recharge list; it can be charged to a greater capacity of 59% in only 30 minutes. Considering that it has the advantage of a little quicker 30W connected charging speed, that’s not too bad.
Best battery life phone
As previously, the Galaxy S24 Ultra finishes our battery recharge test in second place with a respectable 71% after 30 minutes. Even though it is the same as its predecessor, its quicker 45W connected charging speed allows it to do this. We also found that its 39% charge level with 15 minutes of charging is sufficient for when you need to fill up if you’re pressed for time.
The OnePlus 12 is the last device on the list, with its absurd 80W wired charging that charges the phone to 100% in 30 minutes. It destroys every other flagship device in this comparison, but what’s even more amazing is that it just takes 15 minutes to get 60% charge. OnePlus prioritizes battery and charging, as seen by the remarkable performance of its two recent launches, the OnePlus Open and 12R.
Not to mention, OnePlus is one of the few phone companies that ships their devices with a charging adaptor. For instance, the OnePlus 12 includes an 80W charging adaptor, whereas the other phones need you to buy one separately.
