Afidus ATL-200 camera can capture time-lapses for up to 80 days on battery power: Digital Photography Review
Buy Afidus 1080P Full HD 2Mega Pixels Outdoor home security IP camera Dome type with 2.8-12mm lens IR night vision water proof vandal, PoE, mSD card, IP66, IK10, ONVIF VH-230V1 (not Hikvision)