The External Battery for NVS powers the Nexto DI NVS.
The battery can be used to simultaneously power the NVS and an external drive when doing dual backups. When it's time to recharge the battery, it uses the same AC adapter that was supplied with the Nexto NVS. A power cable is included for connection to the NVS, as well.
12V lithium-ion battery
Charges and operates the Nexto NVS
Can operate both the NVS and an external drive when doing simultaneous backups
Uses same AC adapter that comes with the NVS for charging