https://www.cnbc.com/2019/04/01/kuo-apples-next-iphones-will-have-significantly-larger-batteries.html

Apple's 2019 iPhone lineup could include new iPhone models with significantly more battery capacity, according to a research note from TF International Securities analyst Ming-Chi Kuo.

If Apple were to include higher-capacity batteries in its newest iPhones, as predicted in the note, it could serve as a major selling point as iPhone sales growth has slowed in recent years. Some surveys point to battery life as the top reason that consumers upgrade to a new device.