With a charging time of 1 1/2 hours, this lithium-ion battery is 7.4 volts, 1380 mAh, and is intended to use with models: VX451G7, VX454D0, VX454G7, VX459D0, VX459G7, EVX539G65, EVX539G75, and EVX5400D025. This battery pack fits models VX451G7, VX454D0, VX454G7, VX459D0, VX459G7, EVX539G65, EVX539G75, EVX5400D025, 48ZU25, 48ZU26, 48ZU27, 48ZU28, 48ZU29, 48ZU30, 10C615, 10C616, 45CP58, 45CP59, 45CP60, 45LW47, 45LW48, 45LW49, 45LW50, 45LW51, and 45LW52.