Nikon D3X - Manual (Page 465)

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MH-22 quick charger
Rated input AC 100–240 V (50/60 Hz)
Rated output DC 12.6 V/1,200 mA
Supported batteries Nikon EN-EL4a/EN-EL4 rechargeable Li-ion batteries
Charging time per
battery Approx. 2 hours and 25 minutes (EN-EL4a) or 1 hour
and 40 minutes (EN-EL4) when battery is fully
discharged
Operating temperature 0–40 °C (+32–104 °F)
Dimensions (W × H × D) Approx. 160 Ч 85 Ч 50.5 mm (6.3 Ч 3.3 Ч 2.0 in.)
Length of cord Approx. 1800 mm (5 ft. 11 in.)
Weight Approx. 260 g (9.1 oz.), excluding power cable
EN-EL4a rechargeable Li-ion battery
Type Rechargeable lithium-ion battery
Rated capacity 11.1 V/2,500 mAh
Dimensions (W × H × D) Approx. 56.5 Ч 27 Ч 82.5 mm (2.2 Ч 1.1 Ч 3.2 in.)
Weight Approx. 180 g (6.3 oz.), excluding terminal cover