The MH-26aAK is an Adapter Kit for use in charging or calibrating the EN-EL4/EN-EL4a Li-ion batteries on the MH-26a battery charger. The MH-26a battery charger can be used to charge and calibrate the EN-EL18/EN-EL18a rechargeable Li-ion batteries* that power the D4 and D4S D-SLRs as well as the EN-EL4/EN-EL4a rechargeable Li-ion batteries** that power the D3 series D-SLRs. The kit includes one MH-26a battery charger and one BT-A10 Adapter.
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