The correct way to charge an iphone13 for the first time is as follows:
1, the first charge can be full, can not be overcharged for 15 minutes at most, if continue to charge, it will cause the electricity with just fully charged.
2, when the phone prompts that the battery is low, charge it immediately, do not charge it after use.
3, charging must use the original iPhone charger.
4, do not often charge the phone, the phone prompts insufficient power to charge.
5, it is best to have a complete charge and discharge process every week, that is, from red light to full charge.
I hope the answer helped you.