The iPhone SE 4 is expected to use the same battery as the iPhone 14, which has a capacity of 3,279 mAh[1][3][4]. The iPhone 14 Pro has a slightly smaller battery at 3,200 mAh[2][5]. However, the iPhone 14 Pro can last longer than the regular iPhone 14 due to its more efficient A16 Bionic processor and its adaptive screen refresh rate[2]. The iPhone SE 4 is rumored to have a more modern A18 chip, which could lead to similar battery performance as the iPhone 14, despite the older phone's less efficient components[3][4].
Citations:
[1] https://www.macrumors.com/2023/12/06/iphone-se-4-reuse-iphone-14-battery/
[2] https://www.tomsguide.com/news/iphone-14-battery-life-results-heres-how-long-all-four-models-last
[3] https://www.phonearena.com/reviews/iphone-se-4-2025-vs-iphone-14_id6751
[4] https://www.phonearena.com/news/iphone-se-4-battery_id164279
[5] https://www.phonearena.com/news/iphone-14-battery-life_id140058
[6] https://www.tomsguide.com/phones/iphones/iphone-se-4-vs-iphone-14-which-low-cost-iphone-is-best
[7] https://www.reddit.com/r/iphone/comments/199pwzy/the_iphone_se_4_design_according_to_macrumors/
[8] https://www.reddit.com/r/iPhone14Pro/comments/1cfvzdz/some_people_say_that_the_batteries_in_the/