It may be because the charging protection is turned on. The higher the charge, the slower it charges. The iPhone 13 stops charging at 97%. This may occur for the following two reasons: the iPhone has turned on the "Optimize Battery Charging" function. After enabling this function, in some cases, the iPhone will delay charging beyond 80%.

Not normal, because the power consumption of the new iPhone 13 should be between 20-25, and the power consumption of 30 in three hours is obviously beyond the normal range. It may be due to improper use of the mobile phone, such as using too many applications, using too many games, or using too many videos, which will cause the mobile phone to consume more power.

Normal. It's normal for a new Apple to have only 97% of its battery remaining after two months of use. It's the same for me. After four months of use, I only have 97% of its battery remaining because the battery will slowly wear out as you use it. It becomes less and less durable as it ages.

After half a year of use, the battery health of the iPhone is still 97% normal. After half a year of use, it is normal for the health remaining amount to be between 85% and 99%, usually around 95%. If it is 100% or less than 80%, it is abnormal. Logically speaking, a battery has a limited number of recharges from when it is new until its life is exhausted.