Can I find my iPhone when the battery is dead?
Sometimes when an iOS device goes missing, the Find My app (Find My iPhone before iOS 13) helps to locate and recover the device. Ideally, the battery on the lost iPhone has enough juice for iCloud to track the location live.
In some cases, the lost device has a dead battery or is simply turned off. So does Find My still work? Live tracking will not work, but Find My may still be able to lead you to your missing phone by showing you its last known location.