Samsung is testing silicon-carbon anode batteries across the Galaxy S27 lineup but has not decided whether the upgrade will extend beyond the S27 Pro and S27 Ultra.
Higher battery costs, along with sharply rising RAM and storage chip prices over the past two years, are driving the hesitation on broader adoption.
The likely consequence is that the base Galaxy S27 and S27+ may keep battery sizes similar to their predecessors instead of getting the higher-capacity cells planned for premium models.
Earlier reports said Samsung already brought silicon-carbon batteries to the Galaxy Z Fold 8 line and is preparing roughly 5,087mAh and 5,534mAh packs for the S27 Pro and Ultra.