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The battery is built-in (non-removable by the user). For the 4G version: although some sources mention 25W fast charging support. One spec list states “Quick Charging Yes, 25W” for the 4G model. In the spec sheet from Samsung Philippines: typical capacity 5,000 mAh, minimum rated ~4,900 mAh. Real-world reports: Many users claim the 5,000 mAh capacity gives around one full day of use, sometimes up to two, depending on usage.
Capacity: 5,000 mAh (typical). Type: Non-removable Li-Ion / Li-Polymer cell. Charging: Wired fast-charging supported (≈15 W in some markets) for the 4G version. For the 5G version (Galaxy A13 5G), battery is also 5,000 mAh (typical) with stated up-to times: Internet usage LTE up to ~19-20 hours, Wi-Fi ~21 h, video playback ~22 h. The official spec sheet gives: “Internet Usage Time (LTE) Up to 20 h”, “Wi-Fi Up to 21 h”, “Video Playback Up to 20-21 h”, “Audio Playback Up to 94 h” for 4G version.