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Which Smartphone Has the Best Battery Life in 2025? Samsung, Apple, or OnePlus

Smartphone Battery Life

In today’s fast world, a smartphone with a long-lasting battery is a must-have. Whether you’re watching videos, playing games, or working on the go, nobody wants their phone to die quickly. So, which brand offers the best battery life among Samsung, Apple, and OnePlus? We’ve compared their top models, checked why one stands out, looked at the materials used, and found out which brand has the most users. Let’s dive into the details to help you pick the best smartphone in 2025!

Comparing Battery Life: Samsung, Apple, and OnePlus

Samsung, Apple, and OnePlus

When it comes to battery life, OnePlus 12 takes the crown. According to tests by Tom’s Guide, the OnePlus 12 lasted an impressive 17 hours and 41 minutes on a single charge. The Samsung Galaxy S24 Ultra came close with 16 hours and 45 minutes, while the Apple iPhone 15 Pro Max lasted 14 hours and 2 minutes. These tests were done with heavy usage like browsing, gaming, and streaming, so the results show real-world performance.
Here’s a quick look at the numbers:
Smartphone Model
Battery Size (mAh)
Battery Life (Hours)
15-Min Charge (%)
30-Min Charge (%)
OnePlus 12
5400
17:41
60%
100%
Samsung Galaxy S24 Ultra
5000
16:45
39%
71%
Apple iPhone 15 Pro Max
4422
14:02
20%
41%
The OnePlus 12 clearly wins in battery life, but why is it so good?

Why OnePlus 12 Has the Best Battery Life

OnePlus 12 Has the Best Battery

The secret behind OnePlus 12’s long battery life lies in its 5400 mAh battery, which is bigger than Samsung’s 5000 mAh and Apple’s 4422 mAh. A bigger battery means more power to keep your phone running. Plus, OnePlus uses the Snapdragon 8 Gen 3 chip, which is super energy-efficient. This chip helps the phone use less power while delivering top performance.
Samsung Galaxy S24 Ultra also uses the same Snapdragon 8 Gen 3 chip, but its slightly smaller battery makes it fall just short. Apple’s iPhone 15 Pro Max, with its A17 Pro chip, is efficient too, but the smaller battery size limits its runtime. Another advantage of OnePlus is its super-fast charging—100% in just 30 minutes! Samsung and Apple charge slower, which can be a hassle if you’re in a rush.

What Are Smartphone Batteries Made Of?

Smartphone Batteries Made Of

All three brands—Samsung, Apple, and OnePlus—use lithium-ion batteries. These batteries are made of materials like lithium, cobalt, nickel, and graphite. There’s no big difference in the materials across these brands. The real difference comes from the battery size, software optimization, and how efficiently the phone uses power. For example, OnePlus and Samsung have better software tweaks to save battery, while Apple relies on its iOS system to manage power.
In the future, we might see new battery types like silicon-carbon, which could last even longer. But for now, lithium-ion is the standard, and OnePlus makes the best use of it.
When it comes to popularity, Apple is the king. With around 1.46 billion users worldwide, Apple leads the smartphone market. Samsung follows with about 1.033 billion users, while OnePlus has a smaller but loyal fanbase, especially in India. In the US, Apple holds a 52% market share, Samsung has 24%, and OnePlus is much smaller, as per Statista and BankMyCell data.
In India, OnePlus is loved for its value-for-money phones, but Samsung and Apple dominate due to their brand power and wide range of models. Still, OnePlus is growing fast, with a 3.9% market share in 2024, according to NDTV Profit.

Which Smartphone Should You Choose?

Smartphone Should You Choose

If battery life is your top priority, the OnePlus 12 is the clear winner in 2025. Its big battery, fast charging, and efficient chip make it perfect for heavy users. Samsung Galaxy S24 Ultra is a great choice if you want a mix of battery life, premium features, and a stylus. Apple iPhone 15 Pro Max is ideal for those who love iOS and want a reliable phone, but its battery life isn’t the best.
No matter which brand you pick, all three offer top-notch smartphones. Your choice depends on what matters most—battery, camera, software, or brand loyalty. With new battery tech coming soon, the future of smartphones looks even more exciting!

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