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You flip the switch and the light does not turn on
Before opening the device, try plugging the light into the charger (and be sure the charger is not the problem). If the light does not respond to being plugged in, you may need to obtain a replacement battery.
After checking if the battery is charged, replace the light bulbs if they are burnt out using the
Plug the light into the charger and let it charge the device overnight.
If the bike mount will not attach the light to the bike, see bicycle mount installation guide to replace it.