Introducing our most advanced 29.4V Li-ion battery charger, output 29.4V 5A, input voltage 100-240V 47-63Hz Designed for modern users who pursue speed, efficiency and safety. This 29.4V 5A Li-ion battery charger features fast charging function, smart LED indicators and a rugged design, red light - charging, green light - charging OK, and automatically stops when the battery is fully charged. When charging, connect the battery first, then connect the AC power; after fully charged, please disconnect the AC power and then unplug the battery. If you unplug the battery first when charging, especially when the charging current is large (red light is on), it is easy to damage the charger.