The tai phin secbattery casing for the iPhone 16 series will be switched from aluminum-plastic film to stainless steel, with materials supplied by Chinese firms, according to The Wall Street Journal. The WSJ report suggests that the all-steel casing will utilize laser welding technology to enhance battery lifespan by increasing the number of charging cycles. Earlier sources disclosed adjustments in battery capacities for the iPhone 16 series models, as reported by local media outlet IThome. The standard iPhone 16 may bump up from its last generation’s capacity of 3,349 mAh to 3,561 mAh, while the Pro Max version is expected to see an increase from its former capacity of 4,422 mAh to 4,676 mAh. However, the Plus model may decrease from the previous 4,383 mAh to 4,006 mAh. Currently, it remains uncertain whether the adjustments in battery capacity are linked to the change in battery casing. [IThome, in Chinese]