mAh is fiction.
Hours are not.
A 6,000 mAh nameplate doesn't mean longer battery life — silicon efficiency and display power do most of the work, and they vary three-fold between chips. The Battery Ranker times real-world endurance and charging at standardized 25°C, 200 nits, same Wi-Fi, same script. Every device.
How the ranker measures.
Five real workloads.
We don't trust synthetic battery benchmarks. Every device runs through five scripted workloads — web browsing, video playback, gaming, GPS navigation, and a mixed-use routine that mimics one honest workday. All five contribute to the index; the mixed-use number is the headline.
Standardized to 200 nits.
Brightness is the single biggest variable in battery testing. Every phone is calibrated to 200 cd/m² with our colorimeter before each run — manufacturer 'auto-brightness' adds 30-40% variance and is disabled. Same brightness, same Wi-Fi, same script, every device.
Endurance + charging, together.
Charging speed and endurance are inseparable. A phone that lasts 18 hours but charges in 25 minutes beats a phone that lasts 22 hours but needs 90 minutes to top up — for most people, most of the time. The index weights endurance 70%, charging 30%.
The leaderboard.
Test by test.
Web browsing
The most-cited consumer metric, because it's the closest synthetic measure to actual daily use. We loop a fixed routine of 50 representative pages with image and video content.
- 01OnePlus 1319.8h—
- 02ROG Phone 919.2h+0.6 h
- 03iPhone 17 Pro Max18.4h+0.8 h
- 04Xiaomi 15 Ultra17.8h+0.6 h
- 05Oppo Find X9 Pro17.0h+0.8 h
Video playback
The most efficient workload — modern AV1 decoders run almost entirely on dedicated hardware. Video numbers separate efficient SoCs from the rest.
- 01OnePlus 1322.4h—
- 02iPhone 17 Pro Max22.0h+0.4 h
- 03ROG Phone 921.8h+0.2 h
- 04Xiaomi 15 Ultra20.4h+1.4 h
- 05Oppo Find X9 Pro19.6h+0.8 h
Continuous gaming
The most stressful battery test in the suite. Gaming is where the chip-efficiency gap shows up most starkly — sustained GPU load surfaces every silicon weakness.
- 01ROG Phone 97.2h—
- 02OnePlus 136.8h+0.4 h
- 03Xiaomi 15 Ultra5.9h+0.9 h
- 04Oppo Find X9 Pro5.6h+0.3 h
- 05iPhone 17 Pro Max5.2h+0.4 h
Standby drain
The number that determines whether you'll wake up to a full charge. Standby drain is the silent battery killer; phones with poor radio efficiency lose 8–12% overnight.
- 01iPhone 17 Pro Max24h1.4% / 24h
- 02OnePlus 1324h1.8% / 24h
- 03iPhone 17 Pro24h1.9% / 24h
- 04Xiaomi 15 Ultra24h2.4% / 24h
- 05Galaxy S26 Ultra24h2.6% / 24h
Twelve hours. Then refill.
Each phone ran our mixed-use script for twelve consecutive hours starting at 100% — browser, social, video, camera, navigation, in proportions matched to real telemetry. Then a 0→100% refill on the OEM brick. Both curves are unedited; the verdict is from the lead reviewer after running the test in person.
Best charge-to-endurance ratio in the suite. Twelve hours of mixed use leaves 8% in the tank, and a 12-minute top-up restores half a day.
The endurance champion. Twelve hours of mixed use barely scratches it — still at 13% remaining. The trade-off: 38 minutes to refill that bigger cell.
Best efficiency-per-mAh in the suite — gets a full day from a smaller cell. The charging is the deal-breaker: 92 minutes is the slowest in the top tier.