Phones with reverse charging

Reverse wireless charging

— a feature that allows user to use phone as a power bank — a source of energy for charging other gadgets. The process is carried out wirelessly — for more details, see "wireless charging". Also note that a phone with this feature will not replace a full-fledged power bank (both due to a small battery capacity, and because of the very low efficiency of wireless charging). However, this feature can be useful for emergency recharging miniature devices — for example, smartwatches or wireless headphones.