Sleek and Portable: Measuring just 3.7 × 2.5 × 0.59 inches, this power bank easily fits in your pocket or bag, making it the perfect travel companion to keep your iPhone charged on the go. 5,000mAh Capacity: With a powerful 5,000mAh battery, it provides up to 19 hours of extended video playtime for your iPhone 14 Pro Max. Your Safety, Our Priority: Equipped with Negative Temperature Coefficient (NTC) sensors that monitor temperatures up to 7,200 times per hour for a safer charge. Charge While Recharging: Seamlessly charge your iPhone while Anker 321 Magnetic Battery is recharging, eliminating the need to wait for the power bank to be fully charged before using it.