This EN-EL15b Rechargeable Lithium-Ion Battery, which serves as a spare or replacement for the one provided with the camera. It is designed to offer long life and consistent power, and can be charged or discharged at any time without developing memory effects.

When used with the Z 7 and Z 6, the battery is compatible with the MH-25 and MH-25a chargers, or can be charged in-camera using the EH-7P Charging AC Adapter.