**Versatile Accessory For Your Wire-Free Camera** Circle 2 Accessory Rechargeable Battery works with Circle 2 indoor/outdoor wire-free security camera only. Use it as a backup to power your Circle 2 camera while the other battery is charging. Circle 2 is the most versatile security camera that can be used anywhere at home. To customise your experience even more, choose from a selection of accessories that fit your needs. Use this rechargeable battery as a backup battery for the Circle 2 wire-free camera. It can last up to 3 months on a single charge.