The NVS2825 contains an internal Li-Poly battery that enables the NVS2825 to be used without the power adapter. The external battery is used to power the external HDD when performing the Multi-copy/Sync function and to charge the internal battery.
The device comes with a power adapter, car charger, and USB3.0 cable.
AC power adapter
FireWire 800 cable
NVS external battery
Car charger cable