Multi-function Charger CaseFour-in-one charger is battery charger, (1)could be used as camera storage case to store 2 batteries for nikon z5/z6/z7, (2)and is 2 SD cards Storage case. (3) have a phone power bank function. (4) Can be used as a card reader to read camera memory card information. Three Charging WaysFor Nikon battery charger built with a double-sided plug USB cable (34.5cm length) and Type-C port input. Makes your camera batteries for Nikon D500/D600/D800, with a good charging efficiency, only 2 Hours to fully charge a Nikon D7000 battery. USB port output could be used as a power bank to charge your phones in an emergency. Switch button for ENEL15a chargerThe switch button has 2 functions, you need to press the switch once for the output function; when it is used as a storage box, you need to press the button to turn off the power.