Sleek and Compact: This power bank is the ideal travel companion to keep your iPhone charged on the go because it fits neatly in your pocket or bag at just 3.7 x 2.5 x 0.59 inches. 5,000mAh Capacity: Your iPhone 14 Pro Max can play videos for up to 19 hours thanks to its strong 5,000mAh battery. Our top priority is your safety. For a safer charge, it is outfitted with Negative Temperature Coefficient (NTC) sensors that can measure temperatures up to 7,200 times per hour. Charge While Recharging: You can charge your iPhone without waiting for the power bank to be fully charged by doing so while the Anker 321 Magnetic Battery is recharging.