What Smartphone Has the Best Battery Life in 2025?

If you’re a ‘90s kid like me, you probably remember the good ol’ days of the indestructible Nokia 3310—the kind of phone that could be forgotten in a drawer for a week and still have 60% battery left. Fast forward to 2025 and while our phones are now more powerful than the computers that launched us to the moon, we still ask the age-old question: what smartphone has the best battery life?

Let’s face it, today’s phones can track our sleep, plan our meals, and maybe even ghost our exes—yet they often struggle to last until bedtime. So whether you’re constantly charging, always on the hunt for an outlet, or just want a phone that can last through an actual day of use (shocking, I know), this smartphone comparison will give you the lowdown on the smartphones with best battery life in 2025.

Why Smartphone Battery Drains Fast in the First Place

Before we dive into the winners, let’s talk about the elephant in the room—why smartphone battery drains fast even in the age of AI and foldable screens.

The biggest culprits?

• High Refresh Rate Displays – That 120Hz buttery-smooth scrolling? It guzzles power faster than you can say “OLED.”
• Background Apps – Many apps run wild behind the scenes, syncing, updating, and plotting to drain your battery.
• Always-On Features – Location tracking, 5G, Bluetooth, and a dozen notifications per minute add up.
• Overcharging Habits – Leaving your phone on charge overnight can mess with battery health over time.

Manufacturers have made big strides with smarter chipsets (like Qualcomm’s Snapdragon 8 Elite) and adaptive software, but staying charged is still a balancing act.

Top 5 Smartphones with the Best Battery Life in 2025

Here’s a roundup of which smartphone has the best battery life this year—whether you’re a flagship fanatic, budget buyer, or somewhere in between.

 1. Asus ROG Phone 9 Pro

• Battery Life: 20 hours, 34 minutes (web browsing test)
• Battery Capacity: 5800mAh
• Why It’s a Winner: Built for gamers, this beast can handle marathon sessions and still have juice to spare. It also supports 65W charging for lightning-fast top-ups.
• Bonus: Adaptive refresh rate helps balance power and performance like a Zen master.
• Who It’s For: Gamers and power users who fear low battery more than low frame rates.

2. OnePlus 13

• Battery Life: 19 hours, 45 minutes
• Battery Capacity: 6000mAh
• Charging: Up to 100W wired, 50W wireless (because waiting is so 2024)
• Why It’s Impressive: It’s sleek, premium, and packed with the Snapdragon 8 Elite. Battery endurance is the cherry on top.
• Who It’s For: Anyone wanting the full flagship experience—minus the daily charging anxiety.

 3. Oppo A78 5G 

• Battery Life: 21+ hours (PCMark test)
• Battery Capacity: 5000mAh
• Price: Around £219
• Why It’s Special: For the price of a fancy dinner, you get a phone that just keeps going.
• Downside: Cameras and design aren’t dazzling—but hey, at least your phone won’t die mid-text.
• Who It’s For: Students, budget-conscious users, or anyone who prioritizes battery over bokeh.

4. iPhone 16 Pro Max 

• Battery Life: ~17 hours (real-world use)
• Battery Capacity: ~4685mAh
• Why It’s Strong: Apple’s A18 Pro chip is a battery magician, squeezing out hours of use without breaking a digital sweat.
• Pro Tip: If you want a slightly cheaper option with nearly the same battery life, check out the iPhone 16 Plus.
• Who It’s For: Apple fans who want performance and longevity.

 5. HMD Skyline 

• Battery Life: 18+ hours
• Why It’s Unique: One of the rare phones today that lets you swap out the battery like it’s 2005 again!
• Why It Matters: If you’re eco-conscious or just nostalgic for the days when phones had removable backs, this one’s for you.
• Who It’s For: DIYers, sustainability advocates, and anyone who’s ever said, “They don’t make ‘em like they used to.”

So, Which Smartphone Is Best?

If you’re still wondering which smartphone is best for your needs, here’s a quick cheat sheet:

Final Thoughts

Choosing the smartphone with best battery life in 2025 doesn’t mean sacrificing speed, display, or camera quality. In fact, many of this year’s top performers excel in every area. So whether you’re replying to emails, crushing candy, or streaming the latest soap opera, you deserve a phone that can keep up. Because let’s be honest—running out of battery in the middle of your day is the modern version of being caught without trousers. Awkward. Avoid it! And if you are charging often but it feels like watching paint dry, don’t miss our guide on Why Your Phone Charges Slowly and How to Fix It—because sometimes it’s not your phone, it’s your charger.