Nikon D780 DSLR Camera (Body Only) - Manual (Page 68)

22 First Steps
Charging the Battery
Charge the supplied EN-EL15b battery in the supplied MH-25a
battery charger before use. Insert the battery and plug the
charger in (depending on the country or region, the charger
comes with either an AC wall adapter or a power cable).
• AC wall adapter : After inserting the AC wall adapter into the
charger AC inlet ( q ), slide the AC wall adapter latch as shown
( w ) and rotate the adapter 90 ° to fix it in place ( e ).
• Power cable : After connecting the power cable with the plug
in the orientation shown, insert the battery and plug the cable
in.
• An exhausted battery will fully charge in about two hours and
35 minutes.
Battery charging (flashes) Charging complete (steady)