The Hecto 500XL boasts built-in cooling fins and side visibility cutouts. With a single LED design, it delivers an impressive up to 500 lumens of output and offers eight different modes, including a Daytime Flash option. You can enjoy up to 20 hours of runtime and easily charge it with the integrated USB stick. It securely attaches to a variety of handlebar shapes and sizes and has 8 lighting modes to adapt to any conditions. The rechargeable 1, 803030 Lithium Ion battery offers 3.7V and 2.4Wh of power, weighing only 12.9g and included with purchase.