GoKawiilApple uses firmware trick to ship iPhone 18 Pro Max's oversized battery
Apple's iPhone 18 Pro Max ships with a battery-firmware lock that caps capacity below the 20Wh threshold that triggers international shipping restrictions on single-cell batteries. Once a customer activates the phone for the first time, the lock lifts automatically, restoring the battery to its full rated capacity of roughly 21-22Wh depending on the model. A 'Prepare to Ship' setting can reimpose the cap, limiting charging to 80 percent over 14 days, for anyone sending the device in for repair or resale.