These Rechargeable Portable Hand Warmers keep your fingers toasty and your phone juiced on those crisp fall hikes or morning commutes, with a sneaky power bank tucked inside. It fires up both sides in just three seconds flat, dialing through three notches—107°F for a light nudge, 118°F for steady comfort, or 131°F when you need to thaw out quick.

Shaped to fit your grip without bulk, the 5200mAh pack dishes out eight hours of heat on a full tank, then flips to charge your gadgets via USB-C once you're done warming up. Built tough from ABS plastic and aluminum, it cuts off smartly at 60℃ to dodge any hot spots, so you can count on it for trail runs or just scraping frost off the windshield.