Specification: Current: 20A 30A 40A 80A 120A Material: aluminum alloy Color: black (as pictures show) Weight: about 100g/130g Voltage: 20V ~ 72V 20A version: 4.9*4.5*1.8cm 110g Version 30A: 6*4.5*1.8 cm 110g 40A version: 7*4.5*1.8 cm 130g 80A 120A version: 7.5*6.3*2.5 cm Connector: XT60 Input 20A/30A/40A XT60 male, output XT60 female (if need other plug, please leave a message when ordering) Wire length: 10cm 14AWG silicone wire (including head length, total about 10cm) Thank you for purchasing our balance discharge dual battery, please read this manual carefully, check with your supplier if you can't understand this manual well. Please make sure the battery connected to the module has the same technical specifications you provided to us. Unpredictable results may occur if you use an incompatible dual battery balance discharge battery. Note: Do not mix the ANDOE connector and cathode on the dual battery switch and Please make sure both two battery packs power is turned off before connecting. Warning: Do not touch it directly with your hand. It will become hotter when working. Note: Before ordering, please provide the battery related technical parameters as details. Package include: 1 x Dual Battery Adapter Dual Battery Balance Discharge It can manage two battery packs which are attached to your bike, low power, consumption design, Real-time detection of the voltage of both two batteries packs, online battery check. This module can make both batteries discharge together to power the ebike, it will automatically compare the voltage of each battery and adjust the output current for each battery. The serial port on the module is a port universal, it can be Uart port or battery charging port, depending on what user wants; It can charge both batteries at the same time if it is the battery charging port. Working process1. MCU monitor the voltage of both batteries in real time and send the voltage value via UART if UART interface is available2. For car batteries online detection. Switch to battery and output power if only one battery was connected to this module.3. If the voltage of the two batteries is not the same, one is lower and the other is hi gher, the module will use the higher voltage battery to discharge first to the two battery voltage is approaching simi lar4. Two batteries will charge together when the voltage of the two batteries is similar. Pictures: