Buying guide
The best phones for battery life: which last a full day — or two
Battery anxiety is solvable. A few phones now genuinely last two days, and the rest at least clear a heavy one. Here's who goes furthest — and how fast they refill.
Take the quiz →The two-day phone: OnePlus 15
If battery is your top priority, the OnePlus 15 is the answer. Its 7,300 mAh silicon-carbon cell is the first 7,000-plus mAh battery in a global flagship, and it genuinely stretches to two days of normal use. Better still, it ships with an 80W charger in the box — so the rare times you do run low, it refills fast. Nothing else here lasts as long.
The longest-lasting iPhone: 17 Pro Max
For iPhone buyers, the iPhone 17 Pro Max is the pick. Its 5,088 mAh cell is rated for up to 39 hours of video — the most Apple has ever claimed — and the new vapor chamber means heavy gaming doesn't drain it as fast. It's the iPhone that ends a long day with charge to spare.
Big battery, fast charge: ROG Phone 9 Pro
The gaming-focused Asus ROG Phone 9 Pro pairs a 5,800 mAh dual-cell battery with 65W charging, built to survive marathon sessions. Even the budget Pixel 10a deserves a mention: its 5,100 mAh cell clears 30-plus hours for $499.
What to check
Capacity (mAh) is only half the story — efficiency and charging speed matter just as much. Look for whether a charger is included (Apple and Samsung no longer include one), and how fast the phone hits 50%.
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Frequently asked
Which phone has the best battery life right now?
The OnePlus 15. Its 7,300 mAh battery genuinely lasts two days of normal use and it includes an 80W charger, which most flagships no longer do.
Does a bigger mAh number always mean longer battery life?
Not by itself. A larger battery helps, but chip efficiency and screen settings matter just as much. A well-tuned 5,000 mAh phone can outlast a poorly optimized larger one.