On D850, what's the hole next go the USB connector for?: Nikon FX SLR (DF, D1-D5, D600-D850) Talk Forum: Digital Photography Review
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Power Bank MH 25 USB Cable+Charger+EP 5B EN EL15a EL15 Fake Battery for Nikon Z6 Z7 V1 D850 D810 D810A D800E D750 D610 D600 D500|AC/DC Adapters| - AliExpress
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