voltage range:20V-60V(MAX72V) Recommended maximum power:20A 500W Connection definition: OUT: Connect with controller COM: UART interface (Default) IN-A: Connect with Battery Pack A IN-B: Connect with Battery Pack B Notice: What is on-off switch discharge? Switch discharge means that among the two sets of batteries, the system will use the battery with the highest voltage first until the battery is exhausted, and then automatically switch to the second set of batteries to continue working. The current will not increase in this state . type:36V Colour:black Material:Aluminum alloy Size: 5.1 x 4.5 x 1.8cm Package Contents: 1 x Battery Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.