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The Galaxy S21 5G sports a 4,000 mAh battery, which is modest for a flagship phone with a 6.2″ display and 120 Hz refresh rate. The inclusion of 25 W wired charging and 15 W wireless charging makes recharging convenient, while the reverse wireless charging feature lets the phone wirelessly charge compatible accessories. Because the battery isn’t especially large compared to some rivals, users should expect good—but not class-leading—battery life. In real-world testing, screen-on time varied and some users reported only 4-5 hours SOT when on heavy usage or with 5G enabled.
Typical capacity: 4,000 mAh. Minimum rated capacity: 3,880 mAh. Charging support: Wired: Up to 25 W Super Fast Charging (PPS/USB-PD)
