Specification: Item Type: Electric Bike Double Battery Discharge Converter Material: Aluminum Alloy Input: DC 20-72V Output Voltage: 20V-72V Connector Interface Specification: XT60 Package List: 1 x 20A Dual Battery Parallel Adapter OR 1 x 30A Dual Battery Parallel Adapter OR 1 x 40A Dual Battery Parallel Adapter Note: 1. If you need to use different voltage battery packs, first confirm whether the controller supports 2. The differential pressure range of the two batteries cannot be too different, if the controller does not support wide range voltage, it is easy to damage the equipment, and the battery capacity can be different