The hope r4 standard battery pack is a powerful front light that will guide you through your favourite trails in the darker hours of the day and keep you visually seen when it comes to riding through busy towns and cities the light uses 4 of the latest cree leds which helps the light produce a bright 2000 lumens 1500 measured the all sports pack comes supplied with one 4 cell es energy status batteries this means you are able to go out for longerendurance rides in the evening ideal f