Charge the battery to 100% after every time you see the voltage drop below 50% or a minimum one time every 7 days if ridning daily. The preferred temperature of storing the bike is between 40-60°F. When storing the bike for more than a month, make sure the battery is at 100% and recharge a minimum of 1 time every 25 days. Note: The battery is 100% charged when the charger is showing Green light.