Charger power interface for the US regulation・ the number of rechargeable batteries: 2・ when charging the charger light turns red・ full charge when the charger light turns green; first charger will automatically identify the load of the equipment being charged The size of the way to constant current charging・ and so the charge to the charger rated voltage・ the charger will be a fixed constant voltage charging・ lithium battery is charged to the voltage・ the charger and then the minimum current