Historically, the iPhone SE lineup has offered modest battery performance compared to flagship iPhones, but the iPhone SE 4 is rumored to address this with a much larger battery capacity. This increase, paired with one of Apple's more power-efficient chips, could make the SE 4 a more capable device for daily use, offering better battery life than its predecessors.
Charging upgrades may also be in store, with the iPhone SE 4 potentially coming with MagSafe and faster wireless charging. Unfortunately, however, reverse-wireless charging isn't expected, remaining exclusive to Apple's flagship lineup.