Nikon D780 DSLR Camera (Body Only) - Manual (Page 903)

857 Technical Notes
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EN-EL15b Rechargeable Li-ion Battery:
Type Rechargeable lithium-ion battery
Rated capacity 7.0 V/1900 mAh
Operating
temperature
0 °C–40 °C (+32 °F–104 °F)
Dimensions
(W× H × D)
Approx. 40 Ч 56 Ч 20.5 mm (1.6 Ч 2.2 Ч 0.8 in.)
Weight Approx. 80 g (2.9 oz), excluding terminal cover