Extra standard iFORCE high quality, long lasting, Ni-MH Battery.
Reference #: 5400100009544 iFORCE Battery Charger
Extra standard iFORCE Smart Charger.
Reference #: 5400100012094 iFORCE Light & Siren Kit The same lighting, vehicle-grade siren, & excellent battery life - equipped to quickly install on nearly any bicycle and wheel size. This state-of-the-art system offers rear and front riding lights, emergency lights, a vehicle-grade siren, integrated frame battery, and simple thumb thumb switches.Reference #: iforcelightkit