I have been using iPhone se 1st generation battery is very poor
Why battery performance and camera performance became very poor in span of 2.5 years for my iPhone se 1st generation
iPhone SE
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Batteries are consumables; they lose capacity over time. Go to Settings/Battery and tap Battery Health. If it says the battery is weak, or the battery capacity is less than 80% make an appointment to have your battery replaced by Apple. It will cost $49.
