DELTA Pro Extra Battery 3600Wh, 2.7H to Full Charge, Battery Backup for Home Use
Capacity 3600Wh 7200Wh — 3600Wh 3600Wh 3600Wh 3600Wh. Expandable Capacity. Just plug the generator directly into your extra battery via the port on the back. This works even when disconnected from your DELTA Pro.