The KGI analyst Ming-Chi Kuo issued a research note where he predicted that the upgraded TrueDepth camera will need a battery with larger capacity and Apple has the technologies for developing such batteries.
Earlier reports claimed that the performance issues of the older iPhone models could be related to the old battery and if the battery is changed to a new one, the issues may be solved. John Poole, the Geedbench founder, discovered that the performance issues were related to the battery age.