Nikon D3000 - Manual (Page 208)

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MH-23 quick charger
Rated input AC 100–240 V (50/60 Hz)
Rated output DC 8.4 V/900 mA
Supported batteries Nikon EN-EL9a or EN-EL9 rechargeable Li-ion battery
Charging time Approx. 1 hour and 40 minutes (EN-EL9a) or 1 hour and 30 minutes
(EN-EL9) when battery is fully discharged
Operating temperature 0–40 °C (+32–104 °F)
Dimensions
(W × H × D)
Approx. 82.5 Ч 28 Ч 65 mm (3.2 Ч 1.1 Ч 2.6 in.)
Length of cord Approx. 1800 mm (5 ft. 11 in.)
Weight Approx. 80 g (2.8 oz.), excluding power cable
EN-EL9a rechargeable Li-ion battery
Type Rechargeable lithium-ion battery
Rated capacity 7.2 V/1080 mAh
Dimensions
(W × H × D)
Approx. 36 Ч 14 Ч 56 mm (1.4 Ч 0.6 Ч 2.2 in.)
Weight Approx. 51 g (1.8 oz.), excluding terminal cover