Compact Lithium-ion power supply for the Nikon D100 Digital SLR. Up to 1600 images can be shot on one charge. Two can be used in the Multi-function battery pack MB-D100 for extended shooting periods. To charge the EN-EL3 use the MH-18 (supplied with D100), or the optional multi-charger MH-19 that charges two EN-EL3 batteries from 100-240V mains power supplies or from a 12V cigarette lighter.