SB-packed, 54 Wh, 10.9 V DC, compatible with all B54 lamp heads, charging time: 80% in 1.5 h, 100% in approx. 2.5 h, max. illumination duration: up to 50 h (depending on lamp mode) with Bluetooth LE communication for smartphone and smartwatch (Android and iOS), supports Garmin Edge devices with display of remaining light time, black anodized aluminum housing for better heat reflection and cooling of the cells, light sensor for intelligent activation of the low beam (e.g. tunnel passage), preheating function at low charging temperature, charge cut-off in case of overheating, hibernation mode, inexpensive battery replacement for €99, up to 5 years warranty with at least 50% usage in Longlife mode, incl. Velcro strap for mounting on the frame, padded holder, housing dimensions 98 x 46 x 50 mm, weight 300 g Item Accessory Version Headlight Area of ​​use Bicycle Main color black