Forget daily charging – this upcoming phone's 10,001mAh battery helps it last a week, but it's still lighter than an iPhone 17 Pro Max

Days of power

· TechRadar

News By James Rogerson published 20 January 2026

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  • The Realme P4 Power has a 10,001mAh battery
  • Despite that huge capacity, it weighs just 219g
  • It's launching in India on January 29, with a global launch to be confirmed

We seem to be in the middle of a battery capacity revolution, as following on from the likes of the 7,300mAh OnePlus 15 leaping ahead of the 5,000mAh smartphone standard last year, now Realme has teased a phone with a 10,001mAh battery.

Dubbed the Realme P4 Power, this phone is launching on January 29, but the company has already shared a lot of details about it, including that the phone can apparently manage 185.7 hours of music playback, 21.3 hours of navigation, 32.5 hours of YouTube, or 72.3 hours of call time on a single charge.

So this is a battery that for most people will probably last at least a few days, and which could feasibly keep going for up to around a week if you’re a light enough user. Despite that, the Realme P4 Power weighs just 219g, which is about the same as the 5,000mAh Samsung Galaxy S25 Ultra and less than the 5,088mAh iPhone 17 Pro Max.

This is largely thanks to silicon anode technology, which can store more energy than the graphite used in traditional lithium-ion batteries. Also used in some EVs, this tech means a higher energy density for a similar weight, which helps the P4 Power avoid brick status.

Fast charging and built to last

The P4 Power also charges at 80W and offers 27W reverse charging, which makes this very viable as a means to power up other devices.

Plus, the phone has passed military-grade shock tests, and its battery health should be able to stay above 80% for up to eight years, so it won’t wear out fast.

Battery aside, the Realme P4 Power has a MediaTek Dimensity 7400 Ultra 5G chipset, a 50MP main camera, and a 144Hz screen with a peak brightness of 6,500 nits, so its other specs sound promising too.

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