Connection definition:
OUT: Connect with controller
COM: UART interface (Default)
IN-A: Connect with Battery Pack A
IN-B: Connect with Battery Pack B

What is Balanced Discharge?
Balanced discharge means that when the voltages of the two sets of batteries are used to the same extent, the system will automatically use the two sets of batteries at the same time and increase a certain current.
What is switch discharge?
Switch discharge means that among the two sets of batteries, the system will give priority to the battery with the highest voltage 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.
At present, all we sell are balanced discharge versions.

Important tip:
Make sure battery pack which connected with module has the same technical parameters you provided for us . unpredictable results can occur if you use the incompatible Double Battery Pack Switcher with your battery pack.
Do not touch it by your hand directly. it will become more hotter during discharging.
You have to provide the technical parameters related with your battery as details before ordering.