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The Apple iPhone 12 Pro Max supports 25W max USB charging which is the highest power level for iPhone 12 models achieved using USB Power Delivery technology.

https://gtrusted.com/iphone-12-pro-max-charging-video-analysis-collection

The Apple iPhone 12 Pro Max also has the biggest battery capacity at 3687 mAh allowing the phone to support the highest power charging consumption out of the iPhone 12 family.

Here's how unboxing of the Apple iPhone 12 Pro Max looks like after purchase.

The Apple iPhone 12 Pro Max runs on Apple's newest iOS 14 chipset and ships with only a USB Type-C to Lightning cable accessory.

The Apple iPhone 12 Pro Max is the largest and heaviest iPhone 12 model with 6.7 in 1284 x 2778 pixels screen and 512GB 6GB RAM memory.

Instead of two rear cameras on the iPhone 12, you will get a triple 12MP rear camera setup on the Apple iPhone 12 Pro Max that came with better quality supporting 2.5x optical zoom, TOF 3D LiDAR scanner (depth) and HDR10.