Leaks and rumors indicate that the upcoming Apple iPhone 17 Pro Max will feature a battery capacity of approximately 5,000mAh, marking the largest battery ever included in an iPhone. This represents an increase of about 315mAh over the 4,676mAh battery found in the iPhone 16 Pro Max. The larger battery aligns with reports that the iPhone 17 Pro Max will be thicker than its predecessor. While the increased capacity is expected to improve battery autonomy to around 35 hours, some sources caution that this may not necessarily translate into significantly longer battery life. The battery upgrade addresses longstanding user concerns about iPhone battery performance and is seen as a notable change in Apple's design approach for the Pro Max model.