SerfasA(R) warrants to the original purchaser that the product is free of defects in material, construction, and/or workmanship for the lifetime of the product. Battery Warranty - One Year Coverage SerfasA(R) batteries are covered by a 1 year warranty from the original date of purchase. The SerfasA(R) Apollo series is a super compact and surprisingly bright rechargeable waterproof LED light that is quick and easy to mount. Lots of light in a tiny package, plus it fits in your pocket. Features: USB Rechargeable Strap Fits Bars 20 - 40mm Waterproof Construction Micro USB Charging, Cable Included 240Adeg Illumination Visibility Specs: Modes: High: 3 hrs Medium: 6 hrs Slow Flash: 50 hrs Quick Flash: 40 hrs Weight: 29 Grams w/ Bracket Runtime: Up To 50 hrs On Slow Flash Battery: Lithium Polymer