The Nikon MH-25a charger is an updated version of the Nikon MH-25. Key features include:
Stealth Design. With this version of the charger, you get an all-black stealth design. This allows for more discreet charging thanks to the removal of the white lettering. Other than that, you’re looking at the same MH-25 charger.
Charges EN-EL15 Batteries. The MH-25a charges EN-EL15 batteries just like the MH-25, and at the same speed.
Camera Compatibility. This charger is compatible with the Nikon D500 / D610 / D750 / D800 / D800E / D810 / D810a / D850 / D7000 / D7100 / D7200 / D7500 / Z6 / Z 6II / Z7 / Nikon Z7 with ProRes RAW Upgrade / Z 7II / Z5
Battery Grip Compatibility. This charger is compatible with the Nikon MB-N10 / MB-D12 / MB-D14 / MB-D15 / MB-D16 / MB-D17