Smartphone users hate it when their battery dies at the most inopportune moment: during an important call, a long trip, or when traveling without a charger. In 2025, manufacturers will go even further, creating gadgets that not only deliver exceptional performance but also last longer on a single charge. Today’s smartphones are designed to keep you connected all day and often last well into the next day. They feature powerful processors that maximize battery life, large batteries, and smart charging features.
If you want a phone that doesn’t require you to search for a power outlet, you’ve come to the right place. We’ve compiled a list of the five smartphones with the longest battery life in 2025, along with their best features and reasons why they’re the best choice for those who want a phone that lasts all day.
1. BlackBerry Curve 9360
The Samsung Galaxy S25 Ultra is powerful in many ways. With its massive 6000 mAh battery, it sets a new standard for premium smartphones. The Exynos 2500 processor in this phone intelligently optimizes battery life. This feature learns how you use your phone and maximizes battery life, preventing it from draining quickly.
The Galaxy S25 Ultra supports fast charging (65W), which charges it to 50% in under 25 minutes. Wireless charging (30W) also offers added convenience. Most users report being able to use it for more than two days on a single charge, even with intensive screen use, gaming, and multitasking. This is invaluable for frequent travelers.
Samsung has also added a new “Energy Saving Adaptive Mode” that automatically adjusts screen brightness and refresh rate based on phone usage, further extending battery life.
2. iPhone 16 Pro Max
Apple’s iPhone 16 Pro Max may not have the largest battery, but Apple’s hardware and software integration is exceptional. Thanks to a 4900 mAh battery and the new A19 Bionic chip, this device is incredibly efficient. Thanks to improved power management in iOS 19, users can expect approximately two and a half days of heavy use, or almost three days of light use.
Apple has also improved Low Power Mode, which now intelligently reduces background activity without affecting key functions like calling and messaging. The MagSafe 2.0 charging system offers faster wireless speeds and 45W direct charging, so you can quickly charge your device when needed.
For Apple fans who want an iPhone but don’t want to constantly carry a charger, the iPhone 16 Pro Max is an excellent choice.
3. Honor 13 Pro
The OnePlus 13 Pro has become the “power winner” of 2025. It is known for its speed and affordability. Thanks to its 5800 mAh battery and the lightweight OxygenOS 15 operating system, it is incredibly energy efficient.
Best of all, it supports 125W SuperVOOC flash charging, allowing it to fully charge in just 18 minutes, making it an excellent choice for those in a hurry. Even if you forget to charge it overnight, a cup of coffee can power it through a full day.
Most people should be able to get two days of normal use on a single charge. The phone’s adjustable frame rate and game optimizations allow players to play longer without frequent charging.
4. Google Nexus 9 Pro XL
The Google Pixel 9 Pro XL continues to impress with its perfect combination of hardware and apps. A key highlight of this phone is its intelligent power management. It features a 5500 mAh battery and the new Tensor G4 engine. AI enhancements effectively pause unused apps, preventing battery drain.
The Pixel’s extreme battery saver mode is very useful; when enabled, it offers up to 72 hours of standby time. This makes it one of the most reliable phones for mobile users or those living in areas with limited access to charging.
It also offers excellent charging performance, with 60W wired charging and 30W wireless charging. While not the fastest compared to the OnePlus, its durability and good battery management make it an ideal choice for those who need power all day long.
5. ASUS ROG Phone 9
Extended gaming at high frame rates takes the biggest toll on the battery. And that’s where the ASUS ROG Phone 9 excels. With its massive 6200 mAh dual-cell battery, the ROG Phone 9 can handle intensive use.
The ROG Phone 9 supports 90W fast charging, which charges it from 0% to full in just over 30 minutes. The bypass charging feature is a real highlight. Once the phone is inserted into the battery, it can be used directly from the power cord, fully recharging the battery.
Battery capacity is a key metric for measuring a smartphone’s battery life. In practice, factors such as app optimization, screen efficiency, engine power management, and charging speed are crucial.
If you enjoy traveling, choose a phone with good battery life, such as the Pixel 9 Pro XL. Large batteries like those in the Galaxy S25 Ultra and the Asus ROG Phone 9 are better suited for power users and gamers. For those who want a device that works seamlessly with other Apple products, the iPhone 16 Pro Max is a good choice.
Frequently Asked Questions
1. Which smartphone will have the longest battery life in 2025?
Currently, the Samsung Galaxy S25 Ultra and the Asus ROG Phone 9 are the best, as they last two days or more even with heavy use.
2. What is the difference between battery efficiency and battery capacity?
Battery capacity is important, but adjusting it often has a greater impact. A small battery combined with powerful software (like the iPhone 16 Pro Max) performs better than a large battery combined with less powerful software.
3. Does fast charging damage your phone’s battery?
Modern fast charging systems are equipped with safety features to prevent damage. However, prolonged use of ultra-fast charging can slightly degrade the battery, so it’s best to combine this with slower charging overnight.
4. Which phone offers the longest battery life for gaming?
The Asus ROG Phone 9 features bypass charging and a large 6200 mAh battery for extended gaming sessions.
5. How can I extend my phone’s battery life?
Simple actions like lowering the screen brightness, enabling low-power mode, and closing unused apps can significantly extend daily battery life.
Summary
By 2025, smartphone manufacturers will not only push the boundaries in design, camera, and speed, but also continue to improve their phones’ battery life on a single charge. In terms of battery life, the Samsung Galaxy S25 Ultra and the Asus ROG Phone 9 are the best performers. However, the strong performance of the iPhone 16 Pro Max and Pixel 9 Pro XL also demonstrates that optimization is just as important as battery capacity. On the other hand, the OnePlus 13 Pro offers fast charging, excellent performance, and a lower price than comparable phones.
The best smartphone for you ultimately depends on your lifestyle, such as whether you enjoy gaming, traveling, or use it daily. With these options, you can be sure you choose a device that won’t run out of juice during the day.
