When I first heard about a phone with a 10,000mAh battery, I instinctively rolled my eyes a little. That's not just big, that's power bank territory. In a market where 6,000mAh is standard and 7,000mAh is the new generous, 10,001mAh on the Realme P4 Power sounded like a marketing flex.
But I've reviewed enough phones to know that battery capacity alone means nothing. Optimisation decides everything. So, I used the Realme P4 Power as my primary phone and did something reckless.
I charged the Realme P4 Power to 100%, left my charger at home on purpose and took it to our Editor-in-Chief's two-day wedding (happy married life, Anmol). No backup cable, no power bank and I just wanted to simulate a very real scenario. If you travel a lot and forget your charger one bad day, will this phone truly live up to its 10,000mAh claim, or will it fall apart?
Realme P4 Power Key Details
- 1.5K AMOLED
- HDR10+
- Sony IMX882
Hybrid Stabilization
4K@30fps
- Sony IMX480
- 720p@30fps
- Arm Mali-G615
- 80Watt (wired)
- Charger in the box
- 128GB (UFS 3.1)
- Gorrila Glass 7i (Back)
- Plastic Frame (Side)
- IP66/68/69 (Dust and Water Resistant)
- 3 year(s) of OS Update
Day One: Heavy Usage, Zero Panic
Weddings are battery torture tests. You're constantly on your phone clicking photos, shooting videos, replying to messages, coordinating plans, checking maps and doomscrolling between events. Well, I didn't hold back either.
When travelling to the destination, I streamed Prime Video for nearly two hours. Add Instagram, WhatsApp, Chrome browsing, Spotify streaming, calls and plenty of camera usage to the mix. Besides, my work profile was active in the background as well.
Over a full charge cycle, I clocked 9 hours and 25 minutes of screen-on-time with a screen-off time of 1 day and 10 hours. Active drain averaged about 7.11% per hour, with 67% of the battery consumed during that stretch.
That 7% figure is important as most 6,000mAh or 7,000mAh battery phones I've used drop 12-15% per hour with mixed usage. This felt noticeably slower on the Realme P4 Power and its Silicon Carbon battery wasn't dropping sharply. By the end of day one, I wasn't nervous or hunting for sockets at the venue and neither was I rationing my camera usage.
Day Two: Standby Performance Sealed the Deal
Day two is usually when phones start showing stress. Even if screen-on time isn't massive, background drain and standby losses chip away at the percentage.
But what stood out about the Realme P4 Power was that idle drain averaged just 0.85% per hour and during screen-off time, nearly 72% of it was spent in deep sleep. Overnight, the battery barely moved and by the end of the second day, I was at 4%.
Thanks to the 80W fast charging, I could easily charge it from 0–100% in about an hour and 10 minutes.
Now, this isn't just brute battery size, but fine optimisation as well as the phone isn't aggressively killing apps or throttling performance. Since the Realme P4 Power uses the Dimensity 7400-Ultra, which is not exactly power-hungry, the battery life gets a subtle boost from that as well.
Realme P4 Power battery test result: 48 hours without a charger
Honestly, I expected it to merely be big on paper since a lot of the best battery backup phones feel like compromises, with all that thickness, heft and inefficiency. Yes, you can feel the added weight here too. But, for a phone carrying a 10,001mAh cell inside, it's all good.
The biggest difference the Realme P4 Power brought was behavioural. I stopped checking my battery percentage every hour and calculating if I had enough to survive another hour.
By the time the wedding ended, it had proved what I wanted to test. If you travel a lot, forget your charger or simply hate being tied to a wall socket, this phone can genuinely carry you throughout the journey.
Nearly 9.5 hours of screen-on time in my usage with extremely-low idle drain and strong deep sleep optimisation, the Realme P4 Power felt like a battery monster. It brings real two-day comfort if you're not pushing it aggressively every single hour.
If you ask me, for a battery spec that sounded ridiculous at first, that's a pretty convincing result. However, given how many users want a 12,000mAh battery phone now, only time will tell where we're headed next.
Disclaimer: The price & specs shown may be different from actual. Please confirm on the retailer site before purchasing.
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