Apple’s newly launched MagSafe Battery Pack designed for the ultra-thin iPhone Air has been opened up in teardowns, and the numbers have surprised many Apple fans.
The pack carries a 12.26 Wh battery, which translates to around 3,149 mAh. On paper, that’s roughly the same capacity as the iPhone Air’s own internal battery. What makes it even more interesting is that the cell is incredibly thin – just 2.72 mm – slim enough that it could technically fit inside the iPhone Air’s 5.6 mm frame.
Despite packing nearly the same battery power as the phone itself, the MagSafe accessory can only charge the handset up to about 65%. Analysts explain that this shortfall is due to the inefficiencies of wireless charging, where a significant portion of energy is lost during transfer between the pack and the phone.
The discovery highlights both the engineering trade-offs and Apple’s design strategy. By using a similar battery type in both the phone and the MagSafe pack, Apple may be streamlining production while keeping the accessory as thin as possible. However, for users, the expectation of a “full extra charge” isn’t being met.
While many expected the MagSafe unit to deliver almost double the phone’s backup, the reality shows that wireless charging still struggles with energy efficiency compared to wired solutions. The findings are likely to reignite debates on Apple’s focus on design elegance over practical performance in accessories.
For now, the iPhone Air MagSafe pack stands out for its sleek build and shared design DNA with the phone — but its charging limits may leave heavy users reaching for a wired power bank instead.
