Always keep the battery set (NC-200) fully charged especially before storage and prolonged periods of non-use. • Never use damaged or broken cord. • Short circuiting the battery's terminal with the charger's plug may cause overheat and damage the battery set. • The battery pack (NC-200) is restricted to use for this unit. Never use it with other products. • Avoid overdischarging the lighting system, e.g., switch it on until power completely run off. It will shorten the battery life. • Never char