Before using the Model 7500 for the first time, charge the battery pack for about four hours by plugging the unit into a 110/220VAC or 12VDC outlet using the power cord.
首次使用「模组7500」前，请先用电源线将机组接上110或220伏交流电（110/220VAC）或12伏直流电（12VDC）的电源插座，再将电池组充电约四小时。
Before using the Model 7500 for the first time, charge the battery pack for about four hours by plugging the unit into a 110/220VAC or 12VDC outlet using the power cord.
首次使用「模组7500」前，请先用电源线将机组接上110或220伏交流电（110/220VAC）或12伏直流电（12VDC）的电源插座，再将电池组充电约四小时。
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