A:AnswerYes, it can work with iPhone 12, but the wire that comes with the power bank is a USB-C to USB-C cable; please use your iPhone 12's original USB-C to Lightning cable.
A:AnswerCan not guarantee because the heated vest may have its own private charging protocol. The power bank is made mainly to work with phones, tablets, etc.
A:AnswerYes. The power bank is compatible with the Samsung Galaxy A71 5G model SM A716U. Use the phone USB C cable to connect for charging. Fast charging depends on the cable and charger used.