and high Made of high material, durable and practical to useElectric Bicycle Ebike Dual Battery Connection Adapter Switcher Module Increase Battery CapacityThe Dual batteries connected in parallel for additional capacity and range, and the switcher can manage the two batteries on your bike. It will detect the voltage of the two batteries in real time. When one battery is exhausted during riding, it will automatically switch from one battery to the other, again for you Powered by the electric bicycle, or support two batteries to simultaneously supply power to your electric bicycle intelligently and balancedly.Do not confuse the and negative connectors on the dual battery switch. Make that the power of both batteries is turned off connecting. The two battery's voltage need to be the same, and the battery's capacity can be differentType:40A version:7 x 4.5 x 1.8 cm, 130gVoltage: 20V-72VConnector: XT60Wire length: 10cm 14AWG Silicone WireModel: Dual Battery Connection Adaptercolor:As shownMaterial:Aluminum alloyPackage Contents:1 x Dual Battery Connection Adapter(40A)Only the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.