Important: Never charge your Flash or plug the charger into the bike's charge port when the bike is wet or if debris is stuck inside the charge port. Make sure your bike and charge port is completely dry and free from any debris water, snow or ice prior to charging. Charging Flash while it is wet or below 50°F temperatures can damage the charge port and the battery pack and thus voiding the warranty.
To charge Flash, simply plug the charging cable (included) into the small charging port located on the underside of the down tube.
It takes about 4-6 hours to go from fully depleted to fully charged. However, it's good to know that our battery does not have "charge memory," which means that you don't need to worry about waiting until the battery is fully charged before using it, or letting it run out completely before you charge it again.
For more details, check out our info on getting the most out of your battery.