Another criticism of the Samsung Galaxy Z Flip 3 was its slow charging speed. It supports only 15W charging, while the newer Flip 4 gets the same treatment as Samsung’s top-of-the-line Galaxy S22 series’ 25W fast charging technology. While both smartphones share almost identical body dimensions and cases of the Flip 3 fit the Flip 4, the Flip 4 has a 400mAh more battery than the Samsung Galaxy Z Flip 3’s 3,300mAh battery.
But does this extra 400mAh battery help the Flip 4 solve the most crucial problem of short battery life? Let’s find out.
Samsung Galaxy Z Flip 4 vs Samsung Galaxy Z Flip 3 battery test
Both smartphones are set on the same brightness and connected to WiFi to keep this comparison apples-to-apples. These handsets undergo two rounds of battery drain tests: web browsing and watching YouTube videos.
| Model | Web browsing | YouTube videos |
| Samsung Galaxy Z Flip 3 | 10 hours and 13 minutes | 7 hours and 10 minutes |
| Samsung Galaxy Z Flip 4 | 11 hours and 40 minutes | 9 hours and 45 minutes |
In the web scrolling test, the good old Samsung Galaxy Z Flip 3 lasts 10 hours and 13 minutes, and the Samsung Galaxy Z Flip 4 lasts 11 hours and 40 minutes. The latest Flip 4 serves one hour and twenty-seven minutes more than its predecessor in web browsing.
The next round is watching YouTube videos till the battery dies. In this test, the Samsung Galaxy Z Flip 3 survives 7 hours and 10 minutes, and the Samsung Galaxy Z Flip 4 runs for 9 hours and 45 minutes. This means the Flip 4 gave 2 hours and thirty-five minutes more screen time than the Flip 3.
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