Light kit with rechargeable battery and charging cradle that the RC20 is easily clipped into. The charging cradle is supplied with power using any USB power source. ARB-L1 rechargeable battery with 2600mAh. The on/off switch and the mode switch are located on the light endcap and ensure easy operation with fast access to the 4 light levels (1000/425/150/10 lumens) or the strobe mode. The light can be selectively operated with a restricted function mode that only supports switching between turbo, medium, and strobe mode. The status LED in the light signals the charging status while the light is being charged, and also the remaining capacity while in use. Aluminum housing, water-proof as per IPX-8. Cree XM-L2 (U2) LED.