MagicShine MJ-816U Ultimate - XML-U2 version max 1900 Lumen LED bicycle light with 4.4Ah MJ-828 LCD battery, Upgrade version of MJ-816/MJ-816E Light source: CREE XM-L U2 +2CREE XP-G Luminous flux: 1900LM Shell material: 6061-T6 Aluminum alloy Battery: 418650 Li-ion battery (8.4V4.4AH) Surface treatment: Premium Type III hard-anodized anti-abrasive finish