Nikon BL-3 Akkufachabdeckung / volet du logement de l accumulateur / Battery-Chamber Cover.
The BL-3 is a Battery Chamber Cover for the MB-D10 Multi-Power Battery Pack that allows the use of an EN-EL4/EN-EL4a battery with the D7000, D300S and D300; and for the MB-40 Multi-Power Battery Pack, to use with the F6.
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