MagicShine MJ-808U 1100 Lumen 4-mode Bicycle Light with 6.6 Ah Battery Pack (2013 Model, 50% more capacity than the default battery) MJ-808E with CREE XM-L2 Max 1000 lumens LED Bike light New much better quality waterproof 6x18650 6.6 Ah Li-ion Battery pack from a UL/CE/RoHS certified supplier. 2 secure Velcro straps battery case update Charger, 2 O-rings 4 output mode: High (100%) - Low (30%) - strobe - Off