The Light & Motion External Li-Ion Battery Connector Cable connects the Stella 1000 and 2000 to a Light & Motion 3 or 6 Cell Li-Ion Battery (P/N 804-0146-A or 804-0065-B) to increase run-time or recharge the light’s internal battery. Plugs into dongle on Stella power supply. Compatible Lights: Stella 1000, Stella 2000